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Contact

Visit Azizur Rahman

C166, Tait Building

null

Postal Address

City, University of London
Northampton Square
London
EC1V 0HB
United Kingdom

About

Overview

Professor B. M. Azizur Rahman received BSc Eng and MSc Eng degrees in Electrical Engineering with distinctions from Bangladesh University of Engineering and Technology (BUET), Dhaka, Bangladesh, in 1976 and 1979, respectively. He also received two gold medals for being the best undergraduate and graduate student of the University in 1976 and 1979, respectively. He received his PhD degree in Electronic Engineering from University College, London in 1982. From 1976 to 1979, he was a Lecturer at the Electrical Engineering Department, BUET. After completing his PhD he joined University College London as a Post-doctoral Research Fellow and continued his research work on the finite element modelling of optical waveguide until 1988. In 1988, he joined the Electrical, Electronic and Information Engineering Department of City University, London, as a Lecturer, where he is now a Professor. Prof. Rahman is a Member of the Institute of Engineering Technology (formerly IEE), England, Fellow of the Optical Society of America, and a Senior Member of the Institute of Electrical and Electronic Engineers (USA).

Qualifications

PhD Electronics, University College London, 1982
MSc Electronics, Bangladesh University of Engineering & Technology, 1979
BEng Electrical Engineering, Bangladesh University of Engineering & Technology, 1976

Employment

06/2000 - to date City University London, Professor
10/1994 - 05/2000 City University London, Reader
05/1988 - 09/1994 City University London, Lecturer
10/1982 - 04/1988 University College London, Postdoctoral Research Fellow
10/1976 - 09/1979 Bangladesh University of Engineering & Technology, Lecturer

Other appointments

08/2001 - to date City University London, Ass. Dean
05/1991 - 07/2001 City University London, Senior Tutor for Research

Membership of professional bodies

1980 IEEE, Senior Member
1980 IET, Member
1980 Optical Societey of America, Fellow
1980 SPIE (Photonics Society), Member

Research

Research interests

At City University, he leads the research group on Photonics Modelling, specialised in the development and use of the rigorous and full-vectorial numerical approaches, frequency domain modal solution approach, the beam propagation method, and time-domain approach, primarily based on the numerically efficient finite element method. He has published more than 450 journals and conference papers, in the areas of optical waveguides, integrated optics, single polarisation guides, photonic devices, such as high-speed modulators and switches, power splitters, compact bend designs, polarisation splitters, polarisation rotators, polarisation controllers, spot-size converters, optical amplifiers, narrow-band optical filters, nonlinear optical devices, optical structures supporting surface-plasmon modes, photonic crystal fibres, and THz waveguides. His journal papers have been cited more than 1900 times. He has received more than £6 million on research grants from the EPSRC, EU, British Council and industries.

Development of Numerical Methods for Photonics

Practical optical waveguides can have complex shapes, such as microstructures features, slanted side walls and complex materials profiles, such as anisotropic, electrooptic, nonlinear material properties, with complex refractive indices to account for the modal leakage, loss or gain and graded or diffused index profiles. Prof. Rahman has been working for more than 35 years on the development of rigorous and full vectorial finite element method (FEM) based numerical approaches for the modal solution of such practical waveguides in GaAs, InP, silicon, silica, plasmonic, lithium niobate or polymers. Besides the modal solution package, which may be the best in the world, PRG has also developed beam propagation method (BPM) based on the FEM to study light propagation through uniform, tapered or bent optical waveguides. Both standard BPM and also Imaginary distance BPM have been developed to study spot-size converters, polarization rotators, and bent waveguides. More recently, to study time domain phenomenon, a new time-domain approach, but based on the computationally efficient FEM has been developed, partly funded by US Army Microwave Research. This approach is being developed to study photonic crystals, metamaterials, and pulse propagation through optoelectronic systems with strong discontinuities and reflections. Besides these optical methods, the PRG has also developed FEM based electronic, stress, thermal, electric field, and acoustic models to study optical interactions with other physical models to study active, passive, linear, nonlinear, elasto-optic, thermo-optic, electro-optic and acousto-optic photonic devices. These methods form the basis of the tools a wide range of photonic devices and optoelectronic systems described below.

Polarization issues in Photonics

Polarization issues, such as polarization mode dispersion and polarization crosstalk are the limiting factors for high-speed and long-distance communication systems. Earlier, we have worked on the EPSRC funded project on the development of highly birefringent polarization maintaining 'Panda' or 'Bow-tie' optical fibres. More recently, we have been working on the development of polarization maintaining PCFs. We have also studied polarization cross-talk in high-index contrast optical waveguides and also in high-speed modulators. We have designed optical polarizers using metal clad or layered core optical waveguides. We have also developed single-polarization optical waveguides using layers core for which QinetiQ applied for a patent. We have also developed various compact optical polarizers using single section optical waveguide with slanted side wall or using cascaded bent waveguides. Some of these projects were funded by Bookham. Novel polarization rotators, using multiple section design, single section design, bent guides, slanted side walls, asymmetric design, in InP, Silicon based devices have been carried out. We have also developed concept of a novel polarization controller using asymmetric loading and QinetiQ has applied for its patent.

Microstructured Optical Fibres

These new type of microstructured optical fibres, also known as photonic crystal fibres (PCF) or holey fibres is showing a range of novel and useful properties for their applications in optical communications and sensing applications. We have received EU support for the Marie Curie Fellow, Dr Kejalakshmy to study single mode and single polarization studies of such fibres. Dr Kabir also researched on the modal solutions of such exotic optical fibres. Dr Uthman has researched on the bending issues related to PCFs. By being inspired by the optimisation process in nature, Dr Arti Agrawal has developed a new approach to design PCF, called equiangular spiral. We have received an UKIERI Major research grant linking with the key research institutes, such as IIT Delhi, IIT Roorkee and Malavia National Institute of Technology, Jaipur, India. Besides our partners in India, we have research collaborations with ORC at Southampton University, Nottingham University, Heriot Watt University, and Strathclyde University in UK, to develop function specific novel PCFs. New types of microstructured fibres, with spiral air-holes and segmented claddings are also being studied.

THz waveguides and devices

Compared to microwave and optical technologies, the intermediate frequency THz range has largely being not developed. PRG is working with the Rutgers University, USA to develop low-loss metal-clad THz waveguides, which has been fabricated at the Bell Labs, USA. We also have active collaboration with Dr Themistos from Cyprus to study surface Plasmon modes in optical and THz waveguides. Recently the Royal Society is also funding the fellowship of Prof. Chattapadhyay from Visva Bharati University, India to develop THz generators. British Council is funding one ongoing project with collaboration from University of Rochester and IIT Delhi to develop low-loss waveguides and devices. We have a long running collaboration with Frederick University in Cyprus on the design optimization of THz waveguides and devices. We also have research collaboration with City University Hong Kong to develop polymer based THz waveguides.

High-speed modulators

PRG has worked extensively on the development of microwave solver, electro-optic models and their application to design lithium niobate, GaAs, InP and polymer-based high-speed modulators. Improvement of phase matching between the optical and modulation RF waves, impedance matching and reduction of both conductive and dielectric losses have been undertaken to improve the data rates of these modulators. Dr Wongcharoen, Dr Anwar, Dr Haxha and Dr Obayya have worked to the various aspects of these devices. Nortel and QinetiQ and Nortel have directly funded to improve the deeply-etched GaAs modulators, particularly to reduce the unexpected polarization rotation in high-speed GaAs modulators.

Research Students

Name
Muhammad Uthman
Thesis Title
Microstructured optical fibre
Further Information
graduated in Nov. 2013
Name
Isuru Wijaratane
Thesis Title
Second Harmonic generations in PCF
Further Information
completed Nov 2013
Name
Suchara Sriratanavaree
Thesis Title
Acoustic-optical interactions in optical waveguides
Further Information
oral is in Jan 2014
Name
Christos Markides
Thesis Title
THz wavegudies and devices
Further Information
oral is arranged in Jan. 2014
Name
Raiyan Kabir
Thesis Title
Development of Finite eleemnt based Time domain approach
Further Information
partially funded by US Army Microwave research
expected to complete by Sept. 2014
Name
Anita Quadir
Thesis Title
Plasmonic waveguides
Further Information
working on both optical and THz waveguides
expected to finish by Dec 2014
Name
Enayet Rahman
Thesis Title
Light guiding modelling in eyes
Name
Sasan Saudi
Thesis Title
Silicon Photonics
Name
M Saytanarayana
Thesis Title
Graphene-based photonics
Further Information
started in Dec. 2013

Publications

Book

  1. Rahman, A. and Agrawal, A. (2013). Finite Element Modeling Methods for Photonics. Artech House. ISBN 978-1-60807-531-7.

Chapters (9)

  1. Rahman, B.M., Uthman, M., Quadir, A., Grattan FREng, K., Markides, C. and Themistos, C. (2015). Emergence of THz technologies and design and optimisation low-loss waveguides and devices. Electrical and Computer Engineering (ICECE), 2014 International Conference on (pp. 389–393). IEEE. ISBN 978-1-4799-4167-4.
  2. Themistos, C., Rahman, B.M.A., Markides, C., Uthman, M., Quadir, A. and Kejalakshmy, N. (2014). Characterization of graphene-based devices for THz Systems.
  3. Agrawal, A. and Rahman, B. (2013). Introduction. In Rahman, A. and Agrawal, A. (Eds.), Finite Element Modeling Methods for Photonics Artech House. ISBN 978-1-60807-531-7.
  4. Azabi, Y.O., Agrawal, A., Kejalakshmy, N., Rahman, B.M.A. and Grattan, K.T.V. (2011). Equiangular spiral tellurite photonic crystal fiber for supercontinuum generation in mid-infrared. CLEO:2011 - Laser Applications to Photonic Applications (pp. JThB72–.). Optical Society of America. ISBN 978-1-55752-910-7.
  5. Rahman, B.A. and Grattan, K.T.V. (1999). Mathematical techniques in fibre optic sensor applications. In K T V Grattan, (Ed.), Optical fibres Sensors Technology,(Vol. 3: Applications and Systems) Kluwer Academic Press. ISBN 0-412-82570-8.
  6. RAHMAN, B., BUAH, P. and GRATTAN, K. (1995). Finite element solution of nonlinear optical waveguides. In Tamir, T., Griffel, G. and Bertoni, H.L. (Eds.), Guided-wave optoelectronics (pp. 455–461). Plenum Press.
  7. WONGCHAROEN, T., RAHMAN, B. and GRATTAN, K. (1995). Power coupling efficiency for electro-optic directional coupler switch. In Tamir, T., Griffel, G. and Bertoni, H.L. (Eds.), Guided-wave optoelectronics (pp. 213–219). Plenum Press. ISBN 0-306-45107-7.
  8. Rahman, B.A. and et al., (1991). Accurate finite element modelling of optical fibre propagation characteristics for sensors. In KTV Grattan, (Ed.), Sensors: Technology, Systems and Applications Adam Hilger. ISBN 0-7503-0157-0.
  9. Rahman, B.A. Finite element analysis of optical waveguides. In W Huang, (Ed.), Methods for optical guided-wave devices: Modes and Couplings (pp. 187–216).

Conference Papers and Proceedings (310)

  1. Thai, P.Q. and Rahman, B.M.A. (2016). Optimization of defected-core photonic crystal fiber for salt solution sensing using finite element method and factorial analysis. .
  2. Hada, S.L. and Rahman, B.M.A. (2016). Solutions of low-index and high-index contrast optical waveguide by using full-vectorial FEM. .
  3. Taher, K.A., Majumder, S.P. and Rahman, B.M.A. (2015). PMD tolerance of 107 Gb/s PM-QPSK system at optimum transmitting power. .
  4. Rahman, B.M.A. (2015). Design and optimization of silicon photonic devices. .
  5. Soudi, S. and Rahman, B.M.A. (2015). Design of compact polarization splitter using silicon nanowires. .
  6. Karim, M.R., Rahman, B.M.A. and Agrawal, G.P. (2015). A broadband mid-infrared supercontinuum generation using Ge<inf>11.5</inf>As<inf>24</inf>Se<inf>64.5</inf> channel waveguide. .
  7. Karim, M.R., Rahman, B.M.A. and Agrawal, G.P. (2015). A broadband mid-infrared supercontinuum generation using Ge<inf>11.5</inf>As<inf>24</inf>Se<inf>64.5</inf> channel waveguide. .
  8. Karim, M.R., Rahman, B.M.A. and Agrawal, G.P. (2015). A broadband mid-infrared supercontinuum generation using Ge<inf>11.5</inf>As<inf>24</inf>Se<inf>64.5</inf> channel waveguide. .
  9. Karim, M.R., Rahman, B.M.A. and Agrawal, G.P. (2015). A broadband mid-infrared supercontinuum generation using Ge11.5As24Se64.5 channel waveguide. .
  10. Karim, M.R., Rahman, B.M.A. and Agrawal, G.P. (2015). A broadband mid-infrared supercontinuum generation using Ge11.5As24Se64.5 channel waveguide. .
  11. Hada, S.L. and Rahman, B.M.A. (2015). Design concepts of a novel mode splitter. .
  12. Hada, S.L. and Rahman, B.M.A. (2015). Design concepts of a novel mode splitter. .
  13. Hada, S.L. and Rahman, B.M.A. (2015). Design concepts of a novel mode splitter. .
  14. Hada, S.L. and Rahman, B.M.A. (2015). Design concepts of a novel mode splitter. .
  15. Soudi, S. and Rahman, B.M.A. (2015). Design of compact polarization splitter using silicon nanowires. .
  16. Soudi, S. and Rahman, B.M.A. (2015). Design of compact polarization splitter using silicon nanowires. .
  17. Soudi, S. and Rahman, B.M.A. (2015). Design of compact polarization splitter using silicon nanowires. .
  18. Soudi, S. and Rahman, B.M.A. (2015). Design of compact polarization splitter using silicon nanowires. .
  19. Rahman, M.M. and Rahman, B.M.A. (2015). Interactions of acoustic and optical waves in Ge-doped silica planar optical waveguide. .
  20. Rahman, B.M.A. and Rahman, M.M. (2015). Interactions of acoustic and optical waves in Ge-doped silica planar optical waveguide. .
  21. Sriratanavaree, S., Leung, D.M.H., Rahman, B.M.A. and Ohishi, Y. (2015). Light-sound interactions in tellurite microstructured fiber. .
  22. Abu Taher, K., Majumder, S.P., Rahman, B.M.A. and IEEE, (2015). PMD Monitoring of Polarization Division Multiplex Transmission System Using RF Tone Harmonics. .
  23. Abu Taher, K., Majumder, S.P. and Rahman, B.M.A. (2014). Performance of Different Modulation Formats in 40 Gb/s Optical Systems in the Presence of Polarization Mode Dispersion and Nonlinear Effects. 1st International Conference on Electrical Engineering and Information and Communication Technology (ICEEICT) 10-12 April, Dhaka, BANGLADESH.
  24. Abu Taher, K., Majumder, S.P. and Rahman, B.M.A. (2014). Performance of Multilevel Modulation Formats in 92 Gb/s Systems in the Presence of PMD and Nonlinear Effects. 1st International Conference on Electrical Engineering and Information and Communication Technology (ICEEICT) 10-12 April, Dhaka, BANGLADESH.
  25. Cabrera-España, F.J., Rahman, B.M.A. and Agrawal, A. (2014). Study of the optical properties of a micro pillar array solar cell for different configurations. .
  26. Rahman, B.M.A. (2014). Rigorous characterization of nano-photonic devices. .
  27. Barh, A., Varshney, R.K., Pal, B.P., Agrawal, G.P. and Rahman, B.M.A. (2014). Efficient terahertz generation in a novel microstructured-core double clad plastic fiber. .
  28. Barh, A., Varshney, R.K., Pal, B.P., Agrawal, G.P. and Rahman, B.M.A. (2014). Low-loss hollow core plastic photonic band-gap fiber for efficient THz transmission. .
  29. Barh, A., Varshney, R.K., Pal, B.P., Agrawal, G.P. and Rahman, B.M.A. (2014). Efficient terahertz generation in a novel microstructured- core double clad plastic fiber. .
  30. Barh, A., Varshney, R.K., Pal, B.P., Agrawal, G.P. and Rahman, B.M.A. (2014). Low-loss hollow core plastic photonic band-gap fiber for efficient THz transmission. .
  31. Rahman, B.M.A., Uthman, M., Quadir, A., Grattan, K.T.V., Markides, C. and Themistos, C. (2014). Low-loss THz waveguides and devices. .
  32. Rahman, B.M.A., Uthman, M., Quadir, A., Grattan, K.T.V., Markides, C. and Themistos, C. (2014). Low-loss THz waveguides and devices. .
  33. Rahman, B.M.A., Uthman, M., Quadir, A., Grattan, K.T.V., Markides, C. and Themistos, C. (2014). Low-loss THz waveguides and devices. .
  34. Barh, A., Varshney, R.K., Pal, B.P., Agrawal, G.P. and Rahman, B.M.A. (2014). Low-loss hollow core plastic photonic band-gap fiber for efficient THz transmission. .
  35. Barh, A., Varshney, R.K., Pal, B.P., Agrawal, G.P. and Rahman, B.M.A. (2014). Efficient terahertz generation in a novel microstructured-core double clad plastic fiber. .
  36. Rahman, B.M.A., Uthman, M., Quadir, A., Markides, C. and Themistos, C. (2013). Design of Low-loss Waveguides and Devices for the Emerging THz Technologies. International Conference on Microwave and Photonics (ICMAP) 13-15 December, Dhanbad, INDIA.
  37. Rahman, B.M.A., Leung, D.M.H., Kejalakshmy, N. and To, L. (2013). Silicon Slot Waveguides and Their Rigorous Characterization. Conference on Silicon Photonics VIII 4-6 February, San Francisco, CA.
  38. Themistos, C., Kalli, K., Komodromos, M., Rahman, B.M.A. and Grattan, K.T.V. (2012). Low-loss multimode interference couplers for terahertz waves. Conference on Microstructured and Specialty Optical Fibres 17-19 April, Brussels, Belgium.
  39. Rahman, B.M.A., Leung, D.M.H., Ahsan, S.N., Tan, P. and Grattan, K.T.V. (2012). Light Guidance Through void: Silicon Slot Waveguides and Their Rigorous Characterization. .
  40. Tanvir, H., Rahman, B.M.A. and Grattan, K.T.V. (2012). Rigorous modal analysis of THz quantum cascade lasers. .
  41. Rahman, B.M.A., Quadir, A., Kejalakshmy, N. and Grattan, K.T.V. (2012). Design optimization of low-loss waveguides for THz guidance. .
  42. Azabi, Y.O., Agrawal, A., Kejalakshmy, N., Rahman, B.M.A. and Grattan, K.T.V. (2011). Equiangular spiral tellurite photonic crystal fiber for supercontinuum generation in Mid-Infrared. Conference on Lasers and Electro-Optics (CLEO) 1-6 May, Baltimore, Maryland.
  43. Agrawal, A., Kejalakshmy, N., Uthman, M., Rahman, B.A. and Grattan, K.T.V. (2011). Ultra low bending loss spiral photonic crystal fibers in terahertz regime. Conference on Lasers and Electro-Optics (CLEO) 1-6 May, Baltimore, Maryland.
  44. Leung, D.M.H., Rahman, B.M.A., Kejalakshmy, N. and Grattan, K.T.V. (2011). Characterization of silicon nanophotonic devices using the finite element method. .
  45. Rahman, B.M.A., Leung, D.M.H., Namassivayane, K., Koshy, T., Jiang, Z.J., Law, A., Ahmed, H. and Grattan, K.T.V. (2011). Rigorous characterization of silicon nanowires and nanophotonic devices. .
  46. Rahman, B.M.A., Tanvir, H., Kejalakshmy, N., Quadir, A. and Grattan, K.T.V. (2011). RIGOROUS CHARACTERIZATION OF SURFACE PLASMON MODES BY USING THE FINITE ELEMENT METHOD. .
  47. Leung, D.M.H., Kan, X.B., Rahman, B.M.A., Kejalakshmy, N. and Grattan, K.T.V. (2011). Optimizing the power confinement in silicon slot waveguides by use of Finite Element Method. .
  48. Rahman, B.M.A., Leung, D.M.H., Namassivayane, K., Koshy, T., Jiang, Z.J., Law, A., Ahmed, H. and Grattan, K.T.V. (2011). Rigorous characterization of silicon nanowires and nanophotonic devices. .
  49. Rahman, B.A., Kabir, S.M.R., Agrawal, A., Quadir, A. and Grattan, K.T.V. (2010). A Finite element approach to Maxwell’s equations in two dimensions. Integrated Photonics Research 25-28 July, Montery, CA, USA.
  50. Grattan, K.T., Rahman, B.M.A., Kejalakshmy, N., Agrawal, A. and et al., (2010). Single mode and single polarization operation in photonic crystal fibers. Conference on Photonic Crystal Fibers IV 14-16 April, Brussels, BELGIUM.
  51. Rahman, B.M.A., Kejalakshmy, N., Tanvir, H., Quadir, A. and Grattan, K.T.V. (2010). Rigorous characterization of surface plasmon modes by using the finite element method. Conference On Nanophotonics III 12-16 April, Brussels, Belgium.
  52. Rahman, B.M.A., Leung, D.M.H., Namassivayane, K., Agrawal, A., Ashraf, M., Tanvir, H. and Grattan, K.T.V. (2010). Rigorous characterization of silicon nanowire for compact nanophotonic devices. Conference on Silicon Photonics and Photonic Integrated Circuits II 12-16 April, Brussels, BELGIUM.
  53. Agrawal, A., Kejalakshmy, N., Rahman, B.M.A. and Grattan, K.T.V. (2009). Soft glass spiral PCF with flat anomalous dispersion at 1064nm and γ2000 W-1km-1 at 1550nm. .
  54. Grattan, K.T., Kejalakshmy, N., Rahman, B.M.A., Agrawal, A. and et al, (2009). Defect-Core PCF with Metal Coated Central Air-hole For THz Propagation. OFC: 2009 CONFERENCE ON OPTICAL FIBER COMMUNICATION .
  55. Rahman, B.A., Tanvir, H., Kejalakshmy, N., Agrawal, A., Themistos, C. and Grattan, K.T.V. (2009). Characterization of terahertz wave confinement in quantum cascade lasers. Integrated Photonics Research, paper IMG2 Hawaii.
  56. Rahman, B.M.A., Kejalakshmy, N., Wongcharoen, T., Kabir, A.K.M.S. and Grattan, K.T. (2008). Full-vectorial Solutions of Photonic Crystal Fibers by using the Finite Element Method. Asia Pacific Microwave Conference 16-19 December, Hong Kong, China.
  57. Rahman, B.A. (2008). Low-loss surface Plasmon waveguides for THz frequencies. Invited paper, Photonics 2008 December, New Delhi.
  58. Rahman, B.A. (2008). Emerging THz etchnology and waveguides and guided-wave devices. Invited paper, Int Conf. Electrical and Computer Engg December, Dhaka, Bangladesh.
  59. Rajarajan, M., Dar, T., Themistos, C., Rahman, B.M.A., Grattan, K.T.V. and Irudayaraj, J. (2008). Design and optimization of surface plasmon resonance based biosensor for the detection of E.coli. Integrated Photonics and Nanophotonics Research and Applications (IPNRA) 13-16 July, Boston Marriott Copley Place Hotel in Boston, Massachusetts, USA.
  60. Rajarajan, M., Themistos, C., Rahman, B.M.A. and Grattan, K.T.V. (2008). Surface plasmon resonance based biosensors for biophotonic applications. Integrated Photonics and Nanophotonics Research and Applications (IPNRA) 8-11 July, Hilton Salt Lake City, Utah, USA.
  61. Rahman, B.A., Agrawal, A., Kejalakshmy, N. and Grattan, K.T.V. (2008). A Quasi-Crystal Spiral Photonic Crystal Fiber: Modal Solutions And Dispersion Properties. OSA Integrated Photonic Research and Applications July, Boston.
  62. Rahman, B.A., Kejalakshmy, N., Agrawal, A. and Grattan, K.T.V. (2008). Characterization of a Teflon PCF for THz frequency applications by using the Finite Element Method. OSA Integrated Photonic Research and Applications July, Boston.
  63. Namassivayane, K., Rahman, A.B.M. and Grattan, K.T.V. (2008). Single-mode and single-polarization operation of photonic crystal fibers. Invited paper, SPIE Photonics Europe April, Strasbourg.
  64. Rahman, B.A., B. M. A. Rahman, , K. T. V. Grattan, , S. S. A. Obayya, and A Agrawal, (2008). Rod shape and position optimization in photonic crystal bends by using finite element-based methods. SPIE April, Strabourg.
  65. B M A Rahman, , D Leung, , S S A Obayya, and K T V Grattan, (2008). Bending and transition losses and mode and polarization conversions in bent optical waveguides. SPIE, Photonics Europe April, Strasbourg.
  66. Rahman, B.M.A., Leung, D.M.H., Obayya, S.S.A. and Grattan, K.T.V. (2008). Bending loss, transition loss, mode coupling and polarization coupling in bent waveguides. .
  67. Grattan, K.T., Rahman, B.M.A., Leung, D.M.H., Obayya, S.S.A. and et al., (2008). Bending loss, transition loss, mode coupling and polarization coupling in bent waveguides - art. no. 69960O. .
  68. Rahman, B.M.A., Agrawala, A., Grattan, K.T. and et al., (2008). Rod shape optimization in photonic crystal bends by the Finite Element Method - art. no. 69891Q. .
  69. Rahman, B.M.A., Agrawala, A., Grattan, K.T.V. and Obayya, S.S.A. (2008). Rod shape optimization in photonic crystal bends by the Finite Element Method. .
  70. Grattan, K.T., Rahman, A.B.M. and Namassivayane, K. (2008). Single-mode and single-polarization operation of photonic crystal fibers - art. no. 69900G. PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) .
  71. B. M A Kumar, , A Agrawal, , B M A Rahman, , V Rastogi, , N Kejalakshmy, and K T V Grattan, (2007). Segmented cladding fibre for high power application in infra-red region. Indo Japanese workshop on recent development in optics and Photonics, IIT 13-14 December, Delhi.
  72. B. M. A. Rahman, , N. Kejalakshmy, , T. Wongcharoen, , A. K. M. S. Kabir, and K .T. V. Grattan, (2007). Full-vectorial Solutions of Photonic Crystal Fibers by using the Finite Element Method. Invited paper, Prof. IEEE Asia Pacific Microwave Conference December, Bangkok, Thailand.
  73. B.M.A. Rahman, , C. Themistos, , N. Kejalakshmy, , M. Rajarajan, , T. Wongcharoen, and K.T.W. Grattan, (2007). Characterization of low-loss waveguides for Terahertz application. Invited paper, ISMOT 2007 (11th International Symposium on Microwave and Optical Technology) December, Rome, Italy.
  74. Rahman, B.M.A., Kejalakshmy, N., Kabir, A.K.M.S., Wongcharoen, T. and Grattan, K.T.V. (2007). Single mode and single polarization operation of photonic crystal fibres. 2007 Asia-Pacific Conference on Communications 18-20 October, Bangkok, Thailand.
  75. Rahman, B.M.A., Kejalakshmy, N., Huda, T. and Grattan, K.T.V. (2007). Characterization of photonic crystal fibers for terahertz frequencies. Conference on Terahertz Physics, Devices, and Systems II 11-12 September, Boston, Massachusetts.
  76. Rahman, B.M.A., Themistos, C., Huda, T. and Grattan, K.T.V. (2007). Low-loss terahertz waveguides exploiting surface-plasmon modes. Conference on Terahertz Physics, Devices, and Systems II 11-12 September, Boston, Massachusetts.
  77. Kejalakshmy, N., Saiful Kabir, A.K.M., Murshed Thakur, G., Agrawal, A., Rahman, B.M.A. and Grattan, K.T.V. (2007). Characterization of single-mode and single-polarization photonic crystal fibers by using a full-vectorial finite element approach. Conference Information: Conference on Photonic Crystals and Photonic Crystal Fibers for Sensing Applications III 9-11 September, Boston MA.
  78. Kejalakshmy, N., Kabir, A.K.A.S., Thakur, G.M., et al., , Agrawal, A., Rahman, B.M.A. and Grattan, K.T.V. (2007). Characterization of single-mode and single-polarization photonic crystal fibers by using a full-vectorial finite element approach. Conference on Photonic Crystals and Photonic Crystal Fibers for Sensing Applications III 9-11 September, Boston, Massachusetts.
  79. B M A Rahman, , C Themistos, , N Kejalakshmy, , A Agrawal, and K T V Grattan, (2007). DESIGN AND OPTIMISATION OF PHOTONIC DEVICES BY USING THE FINITE ELEMENT METHOD. ICOCN, Invited paper August, Islamabad, Pakistan.
  80. Rajarajan, M., Themistos, C., Rahman, B.M.A. and Grattan, K.T.V. (2007). THz frequency radiation in Silver/Polystyrene coated hollow glass waveguides. Integrated Photonics and Nanophotonics Research and Applications (IPNRA) 8-11 July, Hilton Salt Lake City, Utah, USA.
  81. Rahman, B.A., Kabir, A.K.M.S., Namassivayane, K., Rajarajan, M. and Grattan, K.T.V. (2007). Characterization of single mode operation of PCF using finite element method. Integrated Photonics and Nanophotonics Research and Applications, paper ITuH5 July, Salt Lake City, Utah.
  82. Rahman, B.A., Themistos, C., Rajarajan, M. and Grattan, K.T.V. (2007). Characterization of surface-plasmon resonance based sensors for biphotonic applications. Integrated Photonics and Nanophotonics Research and Applications, paper ITuB2 July, Salt Lake City, Utah.
  83. Rahman, B.A., Agrawal, A., Grattan, K.T.V. and Obayya, S.S.A. (2007). Modal solutions for square and circular rod photonic crystals by the finite element method. Integrated Photonics and Nanophotonics Research and Applications, paper IMB5 July, Salt Lake City, Utah.
  84. Arti Agrawal, , B.M.A. Rahman, , K.T.V. Grattan, and S.S.A. Obayya, (2007). Finite Element Time Domain Modelling of 90 degree Sharp Bends. XVI International Workshop on Optical Waveguide Theory and Numerical Modelling,paper no OR-06-05 27-28 April, Copenhagen, Denmark.
  85. Kejalakshmy, N., Rahman, B.M.A., Kabir, A.K.M.S., Rajarajan, M. and Grattan, K.T.V. (2007). Single mode operation of photonic crystal fiber by using a full-vectorial finite element method. Conference on Photonic Crystal Fibers 16-18 April, Prague, Czech Republic.
  86. Rajarajan, M., Themistos, C., Rahman, B.M.A. and Grattan, K.T.V. (2007). Design and characterization of biophotonics devices. Progress in Electromagnetics Research Symposium (PIERS 2007) 26-30 March, Beijing, China.
  87. Grattan, K.T., Rahman, B.M.A., Kejalakshmy, N., Huda, T. and et al., (2007). Characterization of photonic crystal fibers for terahertz frequencies - art. no. 67720D. PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE) .
  88. Rahman, B.M.A., Kejalakshmy, N., Wongcharoen, T., Saiful Kabir, A.K.M. and Grattan, K.T.V. (2007). Full-vectorial modal solutions of photonic crystal fibers operating at terahertz frequencies. .
  89. Rajarajan, M., Themistos, C., Rahman, B.M.A. and Grattan, K.T.V. (2007). Plasmonics in metal-clad terahertz waveguides. .
  90. Rahman, B.M.A., Themistos, C., Huda, T. and Grattan, K.T.V. (2007). Low-loss terahertz waveguides exploiting surface-plasmon modes. .
  91. Rahman, B.M.A., Kejalakshmy, N., Huda, T. and Grattan, K.T.V. (2007). Characterization of photonic crystal fibers for terahertz frequencies. .
  92. B.M.A. Rahman, , A.K.M.S. Kabir, , N. Kejalakshmy, , I. Wijeratne, , M. Rajarajan, and K. T. V. Grattan, (2006). solutions of photonic crystal fibres by using the finite element method. Int. Conference on Computers and Devices for Communication, CODEC 06 18-21 December, Kolkata India.
  93. B M Azizur Rahman, , C Themistos, , M Rajarajan, and K T V Grattan, (2006). Metal-clad waveguides at Terahertz frequencies. Invited paper, Photonics 2006 December, Hyderabad, India.
  94. B. M. A. Rahman, , Arti Agrawal, and K. T. V. Grattan, (2006). Modelling Of Photonic Integrated Circuits by the Finite Element Time Domain Method. Photonics 2006 December, Hyderabad, India.
  95. Rahman, B.M.A., Haxha, S., Haxha, V., Grattan, K.T.V., Achyut, K.D., Yasutake, O., Niloy, K.D. and Jesper, M. (2006). Design optimization of high-speed optical modulators. Conference on Active and Passive Optical Components for Communication VI 3-4 October, Boston, Massachusetts.
  96. Rahman, B.A., Kabir, AKMS, , Namassivayane, K, , Wijeratne, I., Rajarajan, M. and Grattan, K.T.V. (2006). Characterizations of photonic crystal fibers by using a full-vectorial finite element method. Conference on Photonic Crystals and Photonic Crystal Fibers for Sensing Applications II 3 October, Boston MA.
  97. Grattan, K.T., Rahman, B.M.A., Kabir, A.K.M.S., Namassivayane, K. and et al., (2006). Characterizations of photonic crystal fibers by using a full-vectorial finite element method. Conference on Photonic Crystals and Photonic Crystal Fibers for Sensing Applications II 4-7 September, Manchester, UK.
  98. B.M.A. Rahman, , A. Agrawal, , S.S.A. Obayya, , A.K.M.S. Kabir, , K. Namassivayane, , M. Rajarajan, and K T V Grattan, (2006). Finite element based-numerical method for photonic devices. OWTNM- International Conference on Optical waveguide theory and numerical modelling 20-21 April, Varese, Italy.
  99. Haxha, S., AbdelMalek, F. and Rahman, B.M.A. (2006). Design of the semiconductor polarisation controller based on the electrooptic effect - art. no. 61831F. Conference Information: Conference on Integrated Optics, Silicon Photonics, and Photonic Integrated Circuits 3-5 April, Strasbourg FRANCE.
  100. Grattan, K.T., Rahman, BMA, , Somasiri, N, , Wongcharoen, T, and et al., (2006). Characterization of high-index contrast Silica guided-wave devices - art. no. 61250P. Conference on Silicon Photonics 25-26 January, San Jose CA.
  101. Rahman, B.M.A., Haxha, S., Haxha, V. and Grattan, K.T.V. (2006). Design optimization of high-speed optical modulators - art. no. 61240C. Invited Papwer, Conference Information: Conference on Optoelectronic Integrated Circuits VIII 23-25 January, San Jose CA.
  102. Rahman, B.M.A., Kabir, A.K.M.S., Vaghjiani, M., Wijeratne, I.N.M., Sahota, G.S., Rajarajan, M. and Grattan, K.T.V. (2006). Modal solution of photonic crystal fibers by using a full-vectorial finite element method - art. no. 61280N. Conference Information: Conference on Photonic Crystal Materials and Devices IV 23-26 January, San Jose CA.
  103. Rahman, B.M.A., Kabir, A.K.M.S., Vaghjiani, M., Wijeratne, I.N.M., Sahota, G.S., Rajarajan, M. and Grattan, K.T.V. (2006). Modal solution of photonic crystal fibers by using a full-vectorial finite element method. Conference on Photonic Crystal Materials and Devices IV 23 January, San Jose, California.
  104. Rahman, B.M.A., Haxha, S., Haxha, V. and Grattan, K.T.V. (2006). Design optimization of high-speed optical modulators. Optoelectronic Integrated Circuits VIII 23-25 January, San Jose, California.
  105. Rahman, B.A., Allsop, T, , Dobb, H, and Neal, R, (2006). Enhanced spectral sensitivity of fibre long period gratings to refractive index of aqueous solutions utilising copper patterned coatings - art. no. 60830S. Optical Fibers and Sensors for Medical Diagnostics and Treatment Application VI Conference, 21-22 January, San Jose CA.
  106. Rahman, B.M.A., Themistos, C., Rajarajan, M. and Grattan, K.T.V. (2006). Surface plasmon modes for metal-clad Terahertz waveguides. .
  107. Arti Agrawal, , B.M.A. Rahman, and Anurag Sharma, (2006). First Order Evaluation of Reflection from Waveguide Discontinuities. Semiconductor Integrated Optoelectronics Conf, SIOE 2006 Cardiff, UK.
  108. Rahman, B.M.A., Somasiri, N., Wongcharoen, T., Agrawal, A., Grattan, K.T.V. and Rakocevic, V. (2006). Characterization of high-index contrast Silica guided-wave devices. .
  109. B M Azizur Rahman, , A K M Saiful Kabir, , M Rajarajan, and K T V Grattan, (2005). Rigorous Characterization of Photonic Crystal Fibres by using the Finite Element Method. Invited paper, Deradun ICOL December.
  110. B M A Rahman, , T Wongcharoen, , N Somasiri, , R Abdallah, , M Rajarajan, and K T V Grattan, (2005). Characterization of Photonic Guided-wave Devices by using the Finite Element Method. Invited Paper, Optical waveguide Theory and Numerical Modelling July, Sydney, Australia.
  111. Rahman, B.A., Somasiri, N. and Grattan, K.T.V. (2005). Birefringence Compensation for Planar Silica Optoelectronic Devices by using a Layered Waveguide Core. OSA Integrated Photonics Research and Applications, paper ITuD2 April, San Diego.
  112. Rahman, B.A., Wongcharoen, T., Somasiri, N. and Grattan, K.T.V. (2005). Single-mode Operation of Rib Waveguides. OSA Integrated Photonics Research and Applications, paper ITuD4 April, San Diego.
  113. B M A Rahman, , S S A Obayya, , N Somasiri, , M Rajarajan, , F Abdelmalek, and K T V Grattan, (2005). Polarization issues in optical guided-wave devices and systems. Invited Paper, Computational Electromagnetics, IEE meeting March, Nottingham.
  114. Rahman, B.A., B M A Rahman, , N Somasiri, , M Rajarajan, and K T V Grattan, (2005). Polarization issues in photonic devices and systems. Invited Paper, Computational Photonics, Inst. Physics February, Glasgow.
  115. Rajarajan, M., Rahman, B.M.A., Kabir, A.K.M.S. and Grattan, K.T.V. (2005). Modal solutions of photonic crystal fibers by using the H-field finite element method. .
  116. Rajarajan, M., Obayya, S.S.A., Rahman, B.M.A. and Grattan, K.T.V. (2005). Tapered Semiconductor amplifiers. Semiconductor Optoelectronics Conf Cardiff, UK.
  117. Rajarajan, M., Rahman, B.M.A., Abdallah, R.A., Obayya, S.S.A. and Grattan, K.T.V. (2005). Mode beating in tapered high-power deeply-etched semiconductor amplifiers. .
  118. Rajarajan, M., Rahman, B.M.A., Kabir, A.K.M.S. and Grattan, K.T.V. (2005). Modal solutions of photonic crystal fibers by using the H-field finite element method. Conference on Micro- and Nanotechnology - Materials , Processes, Packaging, and Systems II 13 Dec 2004 – 15 Dec 2004, Sydney, AUSTRALIA.
  119. Rajarajan, M., Rahman, B.M.A., Wongcharoen, T., Somasiri, N., Abdullah, R., Kabir, A.S.F. and Grattan, K.T.V. (2004). Rigorous design optimisation of photonic devices by using the finite element method. Invited paper in Asia Pacific Microwave Conf December, Delhi, India.
  120. M. Shah Alam, , N. Somasiri, , B. M. A. Rahman, and K. T. V. Grattan, (2004). EFFECTS OF HIGH EXTERNAL PRESSURE ON PHOTONIC CRYSTAL FIBER. Invited, Int. Conf. Electrical and Computer Engineering December, Dhaka, Bangladesh.
  121. B M Azizur Rahman, , Riyadh A Abdallah, , Salah S A Obayya, , K T V Grattan, and M Rajarajan, (2004). Mode beating in tapered high-power deeply-etched semiconductor amplifiers. Int. Conf. Applied Photonics Tech , Photonics North September, Ottawa.
  122. Rahman, B.A., Wongcharoen, T., Boonthittanont, W. and Obayya, S.S.A. (2004). Polarization maintaining semiconductor waveguides. OSA Integrated Photonics Research,paper no. IFC5 July, San Francisco.
  123. Obayya, S.S.A., Rahman, B.M.A. and Grattan, K.T.V. (2004). Finite element based beam propagation modal solution of optical waveguide problems. IEEE MTT-S Microwave Symposium 6-11 June.
  124. Rahman, B.A., Themistos, C., rajarajan, M., Grattan, K.T.V., Kalli, K. and Komodromos, M. (2004). Design issues for directional coupler-based optical microring filters on InP waveguides. OSA Integrated Photonic Research, paper no. JWB34 June, San Francisco.
  125. Rajarajan, M., Rahman, B.M.A., Abdullah, R.A., Obayya, S.S.A. and Grattan, K.T.V. (2004). Mode beating in tapered high-power deeply-etched semiconductor amplifiers. Conf. Optics & Photonics Integrated Circuits,Euro Opto 2004 April, Strasbourg.
  126. B M Azizur Rahman, , Tiparatna Wongcharoen, , E O Ladele, , Wannee Bonnthittanont, , Salah S A, and KTV Grattan, (2004). Integrated spot-size converters for efficient laser-fiber coupling. Conf. Optics & Photonic Integrated Circuits, Euro Opto 2004 April, Strasbourg.
  127. Rahman, B.M.A., Kabir, A.K.M.S., Rajarajan, M. and Grattan, K.T.V. (2005). Finite element modal solutions of planar photonic crystal fibers with rectangular air-holes. 12th International Workshop on Optical Waveguide Theory and Numerical Modelling 22 Mar 2004 – 23 Mar 2004, Ghent, Belgium.
  128. B M A Rahman, , T Wongcharoen, , S Haxha, , C Themistos, , M Rajarajan, and K T V Grattan, (2004). Rigorous Design Optimizations of Photonic Devices. Waveguide Modelling workshop 22-23 March, Ghent.
  129. B. M. A. Rahman, , T. Wongcharoen, , N. Somasiri, , M. Rajarajan, , C. Themistos, and K. T. V. Grattan, (2004). Characterization of polarization related issues in optoelectronic systems. Invited paper 9 January, Bangkok, Thailand.
  130. Rajarajan, M., Rahman, B.M.A., Wongcharoen, T., Themistos, C., Ladele, E.O., Aslam, M.S., Somasiri, N., Abdullah, R., Kabir, A.S.F. and Grattan, K.T.V. (2004). Finite element characterization of photonic devices for optical communications. Invited paper, Int. Conf. Components and Devices for Communications (CODEC 04) 1-3 January, Calcutta, India.
  131. Themistos, C., Kalli, K., Komodromos, M., Rajarajan, M., Rahman, B.M.A. and Grattan, K.T.V. (2004). Design issues for directional coupler- And MMI-based optical microring resonator filters on InP. .
  132. Rajarajan, M., Rahman, B.M.A., Saiful Kabir, A.K.M., Irfan Ahmed, M. and Grattan, K.T.V. (2004). Full vectorial modal solutions for photonic crystal fibres by use of the finite element method. POWAG Cardiff, UK.
  133. Rahman, B.M.A., Kabir, A.K.M.S., Ahmed, M.I., Sahota, G.S., Rajarajan, M. and Grattan, K.T.V. (2004). Modal hybridism of polarization maintaining photonic crystal fibers by using a full-vectorial finite element method. .
  134. Rahman, B.M.A., Kabir, A.K.M.S., Ahmed, M.I., Rajarajan, M. and Grattan, K.T.V. (2004). Modal solutions of photonic crystal fibers by the finite element method. .
  135. Rahman, B.M.A., Kabir, A.K.M.S., Alam, S., Somasiri, N., Ahmed, M.I., Rajarajan, M. and Grattan, K.T.V. (2004). Rigorous analysis of photonic crystal fibers by using a full vectorial H-field-based finite element method. .
  136. Rajarajan, M., Rahman, B.M.A., Kabi, A.K.M.S., Ahmed, M.I. and Grattan, K.T.V. (2004). Rigorous modal solutions of photonic crystal fibers by using the full vectorial H-field finite element method. IEEE Conf. Oman.
  137. Rahman, B.M.A., Abdallah, R., Rajarajan, M., Parameswaran, A. and Grattan, K.T.V. (2004). Mode beating in tapered high-power lasers. .
  138. Rahman, B.A. (2003). Design Optimizations of Photonic Devices for Optical Communications. Invited paper in Int. Conf. Bangladesh December, Bangladesh.
  139. Rahman, B.M.A., Wongcharoen, T., Obayya, S.S.A., Haxha, S., Somasiri, N., Themistos, C., Rajarajan, M. and Grattan, K.T.V. (2003). Characterization of photonic devices by finite element method. 7th Joint Conference on Information Sciences (JCIS) 26-30 September, Cary, North Carolina.
  140. Rahman, B.A. and Obayya, S.S.A. (2003). Accurate calculation of full-vectorial modes in curved optical waveguides. OSA Integrated Photonics Research June, Washington DC.
  141. Rahman, B.A., Obayya, S.S.A., Boonthittanont, W. and Heaton, J.M. (2003). Novel semiconductor waveguides supporting a single polarization. OSA Integrated Photonics Research June, Washington DC.
  142. Rajarajan, M., Rahman, B.M.A., Wongcharoen, T., Themistos, C., Obayya, S.S.A., Anwar, N., Somasiri, N., Haxha, S. and Grattan, K.T.V. (2003). Rigorous design optimization of photonic devices by finite elements. Invited paper April, Cairo, Egypt.
  143. B M A Rahman, , S S A Obayya, , N Somasiri, and K T V Grattan, (2003). Polarization issues in semiconductor optoelectronic systems. Semiconductor Integrated Opto-Electronic Meeting, SIOE April, Cardiff.
  144. B M A Rahman, , S S A Obayya, , N Somasiri, , M Rajarajan, , C Themistos, and K T V Grattan, (2003). Polarization issues in optical waveguides and optoelectronic systems. Workshop on Optical Waveguide Modelling March, Prague.
  145. Rahman, B.A. and Obayya, S.S.A. (2003). Workshop on Optical Waveguide Modelling. March, Prague.
  146. Rajarajan, M., Themistos, C., Kalli, K., Komodromos, M., Rahman, B.M.A. and Grattan, K.T.V. (2003). Design issues for an ultra compact tapered MMI coupler based 3 dB splitter. .
  147. Rahman, B.M.A., Haxha, S., Obayya, S.S.A. and Grattan, K.T.V. (2003). Design issues for high-speed electrooptic modulators. .
  148. Themistos, C., Rajarajan, M., Kalli, K., Komodromos, M., Rahman, B.M.A. and Grattan, K.T.V. (2003). Design issues for optical microring filters on deeply etched GaInAsP-InP waveguides. .
  149. Rahman, B.M.A., Wongcharoen, T., Ladele, E.O., Bonnthittanont, W., Obayya, S.S.A. and Grattan, K.T.V. (2003). Design of Compact Monolithically Integrated Semiconductor Spot-size converters for efficient laser-fiber coupling. .
  150. Rahman, B.M.A., Haxha, S. and Grattan, K.T.V. (2003). Effect of device parameters on the bandwidth calculations of ultra-high-speed optical modulators. .
  151. Rahman, B.M.A., Obayya, S.S.A. and Somasiri, N. (2003). Polarization issues in optoelectronic devices and systems. SPIE Photonics West January, San Jose.
  152. Rahman, B.M.A., Obayya, S.S.A., Somasiri, N., Rajarajan, M., Themistos, C. and Grattan, K.T.V. (2003). Polarization issues in optoelectronic systems. .
  153. Rahman, B.M.A., Obayya, S.S.A., Somasiri, N., Rajarajan, M. and Grattan, K.T.V. (2003). Polarization issues in photonics. .
  154. AbdelMalek, F., Obayya, S.S.A., Rahman, B.M.A., Davies, J.B., Fernandez, F.A. and Grattan, K.T.V. (2003). Rigorous Full Vectorial Finite Element Analysis of Sharp Optical Waveguide Corners. .
  155. Rahman, B.A., Haxha, S. and Grattan, K.T.V. (2003). Phase atching of GaAs electrooptic modulator by using a highly dispersive tantalium pentooxide overlayer. OSA Integrated Photonics Research Wasington DC.
  156. Rahman, B.A., Haxha, S. and Grattan, K.T.V. (2003). Phase atching of GaAs electrooptic modulator by using a highly dispersive tantalium pentooxide overlayer. OSA Integrated Photonics Research Wasington DC.
  157. Rajarajan, M., Rahman, B.M.A., Wongcharoen, T., Haxha, S., Themistos, C. and Grattan, K.T.V. (2002). Rigorous design optimization of photonic devices. Photonics India 2002 December, Bombay.
  158. B M A Rahman, , S S A Obayya, and N Somasiri, (2002). Polarization issues in optoelectronic sub-systems. Photonics India December, Mumbai.
  159. Rahman, B.A., Wongcharoen, T., Boonthittanont, W., Ladele, E.O., Rajarajan, M., Obayya, S.S.A. and Grattan, K.T.V. (2002). Design of compact monolithically integrated tapered spot-size converters for efficient laser-fiber coupling. IEEE Conf. Electron Device Microwave Optoelectronic 18-19 November.
  160. Rajarajan, M., Rahman, B.M.A., Wongcharoen, T., Haxha, S., Themistos, C. and Grattan, K.T.V. (2002). Design and optimization photonic devices by use of the finite element method. ICON November, Singapore.
  161. Rahman, B.A. and Haxha, S. (2002). Bandwidth calculation of high-speed optical modulators. 7th IEEE High Frequency Postgraduate Student’s Colloquium 19 September, London.
  162. Rahman, B.A., N Somasiri, , B M A Rahman, and S S A Obayya, (2002). Design of compact passive polarization rotator. NUSOD September, Zurich.
  163. B M A Rahman, , T Wongcharoen, , E O Ladele, , M Rajarajan, , S S A Obayya, and K T V Grattan, (2002). Design of compact monolithically integrated semiconductor spot-size converters for efficient laser-fiber coupling. 19th Congress of the Int. Commission for Optics August, Firenze, Italy.
  164. Rahman, B.A., Themistos, C., Rajarajan, M., Obayya, S.S.A. and Grattan, K.T.V. (2002). Design issues for ultra-compact multimode intereference-based 3dB splitters. IEEE/OSA Integrated Photonic Research,Paper ITHD2 July, Vancouver.
  165. Rahman, B.A., Obayya, S.S.A. and Grattan, K.T.V. (2002). Full vectorial finite element solution of complex and nonlinear modes in optical waveguides. IPR,paper IthH4 July, Vancouver.
  166. Rahman, B.A., Somasiri, N. and Windman, M. (2002). Increased polarization crosstalk in planar silica waveguides with high-index contrast and non-vertical side walls. IPR ,paper IthA2 July, Vancouver.
  167. Rahman, B.A., Obayya, S.S.A. and Grattan, K.T. (2002). Full vectorial finite element modelling of optical waveguide devices. Sixth Int. Workshop on Finite Element for Microwave Engineering July, Greece.
  168. Rahman, B.A. (2002). Finite element characterization of modern photonic devices for optical communications. World Engineering Conference July, Kuching, Malaysia.
  169. Grattan, K.T., Obayya, S.S.A., Somasiri, N., Rahman, B.M.A. and et al., (2003). Full vectorial finite element modeling of novel polarization rotators. 10th International Workshop on Optical Waveguide Theory and Numerical Modelling 5 Apr 2002 – 6 Apr 2002, Nottingham, UK.
  170. Rajarajan, M., Rahman, B.M.A., Obayya, S.S.A., Somasiri, N., Abdelmalek, F. and Grattan, K.T.V. (2002). Polarization issues in optical guided-wave devices. Tenth Int. Workshop on Optical Waveguide Theory and Numerical Modelling 5-6 April, Nottingham.
  171. Obayya, S.S.A., Rahman, B.M.A. and Grattan, K.T.V. (2002). Accurate modeling of polarization conversion in single or multiple curved waveguide sections. .
  172. Rahman, B.M.A., Ladele, E.O., Wongcharoen, T., Obayya, S.S.A. and Grattan, K.T.V. (2002). Design of tapered, uniform, and compact monolithically integrated semiconductor spot-size converters for efficient laser-fiber coupling. .
  173. S S A Obayya, , B M A Rahman, and K T V Grattan, (2002). Novel designs of polarization rotatros based on semiconductor curved optical waveguides. Semiconductor Integrated Optoelectronics, SIOE 2002 Cardiff, UK.
  174. R D Ettinger, , S H Khan, and B M A Rahman, (2002). Feasibility of EIT image reconstruction via combinatorial optimisation. presented to EIT Workshp USA.
  175. Rahman, B.M.A., Wongcharoen, T., Boonthittanont, W., Ladele, E.O., Rajarajan, M., Obayya, S.S.A. and Grattan, K.T.V. (2002). Designs of compact monolithically integrated tapered spot-size converters for efficient laser-fiber coupling. .
  176. B M A Rahman, , T Wongcharoen, , S S A Obayya, , N Anwar, , N Somasiri, , M Rajarajan, and K T V Grattan, (2001). Full vectorial analyses of optoelectronic guided-wave devices using the finite element method. Invited paper, First Int Conf Opt. Comm December, Thailand.
  177. Ladele, E.O., Rahman, B.M.A., Wongcharoen, T., Obayya, S.S.A. and Grattan, K.T.V. (2001). Design optimization of monolithically integrated semiconductor spot-size converters for efficient laser-fiber coupling. International Syposium on Electron Devices for Microwave & Optoelectronic applications 15-16 November, Vienna, Austria.
  178. F A Katrisku, , B M A Rahman, and K T V Grattan, (2001). Finite element modelling of cascaded SHG in optical waveguides. Proc. SPIE, Photonics and Applications November, Singapore.
  179. F A Katrisku, , B M A Rahman, and K T V Grattan, (2001). Finite element modelling of cascaded SHG in optical waveguides. Proc. SPIE, Photonics and Applications November, Singapore.
  180. S A A Obayya, , B M A Rahman, , N Somasiri, and K T V Grattan, (2001). Novel designs of compact polarization rotaors. Quantum Electronics –15, and Photonics 2001 September, Glasgow.
  181. Rahman, B.M.A., Ladele, E.O., Wongcharoen, T. and Grattan, K.T.V. (2001). Spot-size converters for efficient laser-fiber coupling. Conference on Active and Passive Optical Components for WDM Communication 21-24 August, Denver, Colorado.
  182. Rahman, B.A. and Themistos, C. (2001). Interferrence mechanism in MMI-based 3dB power splitters on deeply etched InP. July, Sydney, Australia.
  183. Rahman, B.A., Wongcharoen, T. and Grattan, K.T.V. (2001). Symmetrical beam-former for efficient laser-fibre coupling. July, Sydney, Australia.
  184. Rahman, B.A., Obayya, S.A.A., Somasiri, N. and Grattan, K.T.V. (2001). Design of ultra-compact polarization rotators using slanted side walls. July, Sydney, Australia.
  185. Rahman, B.A., Obayya, S.A.A. and Grattan, K.T.V. (2001). Compact polarization rotator using bent optical waveguides. June, Monterey, USA.
  186. Rahman, B.A. and Themistos, C. (2001). Compact MMI-MZI-based optical polarizer. June, Monterey, USA.
  187. Rahman, B.M.A., Somasiri, N., Themistos, C. and Grattan, K.T.V. (2001). Design of optical polarization splitters in a single-section deeply etched MMI waveguide. 10th European Conference on Integrated Optics (ECIO 01) 4-6 April, Paderborn, Germany.
  188. Rahman, B.M.A. (2001). Finite element modelling of Photonic Devices. Workshop April, Paderborn, Germany.
  189. Rahman, B.A., Themistos, C., Somasiri, N. and Grattan, K.T.V. (2001). Optical polarizer in deeply-etched MMI waveguides. April, Paderborn, Germany.
  190. Rahman, B.A., Obayya, S.S.A., Somasiri, N. and Grattan, K.T.V. (2001). Design of compact passive polarization converter in semiconductor waveguides. April, Paderborn, Germany.
  191. Katsriku, F.A., Rahman, B.M.A. and Grattan, K.T.V. (2001). Accurate modelling of second order nonlinear effect in optical waveguides using the finite element method. .
  192. Anwar, N., Rahman, B.M.A. and Grattan, K.T.V. (2001). Design of compact LiNbO3 electrooptic modulators. .
  193. Rahman, B.M.A., Mahmood, N., Gomoluch, J.M., Anwar, N. and Grattan, K.T.V. (2001). Design of strong Bragg gratings in semiconductors. .
  194. Rahman, B.M.A. and Grattan, K.T.V. (2001). Modeling and characterization of guided wave optical sensor devices. .
  195. Anwar, N., Rahman, B.M.A. and Grattan, K.T.V. (2001). Numerical modeling and design of a compact Ti:LiNbO3 Mach-Zehnder interferomeric modulator using etched waveguides. .
  196. Rajarajan, M., Obayya, S.S.A., Rahman, B.M.A., Grattan, K.T.V. and El-Mikathi, H.A. (2001). Optimization of losses in optical bends using the finite element-based beam propagation method. .
  197. N Anwar, , B M A Rahman, and K T V Grattan, (2001). Design and optimisation of Electro-optic modulator. Applied Optics Conference London.
  198. Rajarajan, M., Rahman, B.M.A., Grattan, K.T.V. and El-Mikati, H.A. (2000). Design optimisation of compact bends using finite element based numerical methods. Microwave Conference 3-6 December, Asia Pacific.
  199. Rahman, B.A., Gomoluch, J.M., Rajarajan, M. and Grattan, K.T.V. (2000). Characterization of semiconductor Bragg gratings. Asia Pacific Microwave Conf. December, Sydney, Australia.
  200. Rahman, B.A., Themistos, C. and Grattan, K.T.V. (2000). Design characteristics for MMI-based WDM devices using straight AWG with variable width difference. Photonics 2000, Int. Conf on Fibre Optics and Photonics December, Calcutta.
  201. M Rajarajan, , S A A Obayya, , B M A Rahman, , K T V Grattan, and H A El-Mikati, (2000). Optimization of losses in optical bends using the finite element method. Int. Conf on Fibre Optics and Photonics December, Calcutta.
  202. Rajarajan, M., Themistos, C, , Rahman, B.M.A, and Grattan, K.T.V, (2000). Characterization of multimode interference coupler –based devices for compact WDM components. Progress in Electromagnetic Research Symposium (PIERS) July, Boston, USA.
  203. Rahman, B.M.A., Somasiri, N. and Rajarajan, M. (2000). Compact passive polarization converter using slanted semiconductor rib waveguides. July, Quebec City, Canada.
  204. Rajarajan, M., Rahman, B.M.A, , Obayya, S.S.A, , El-Mikathi, H.A, and Grattan, K.T.V, (2000). Design of compact low-loss bends in optical waveguides. Progress in Electromagnetic Research Symposium (PIERS) July, Boston, USA.
  205. Rajarajan, M., Rahman, B.M.A, , Obayya, S.S.A, and El-Mikathi, (2000). Full-vectorial FE-based BPM for Photonic Devices. Progress in Electromagnetic Research Symposium (PIERS) July, Boston, USA.
  206. Rajarajan, M., Themistos, C., Rahman, B.M.A. and Grattan, K.T.V. (2000). Characterization of MMI and AWG based NxN devices for WDM applications. MELECON 29-31 May, Cyprus.
  207. Rahman, B.A., Arasaratnam, P., Rajarajan, M., Grattan, K.T.V., Meyer, M. and Kemper, M. (2000). Rigorous calculation of optical parameters for monolithically integrated semiconductor spot-size converters. Semiconductor & Integrated Optoelectronics April, Cardiff, UK.
  208. M Rajarajan, , S S A Obayya, , B M A Rahman, , K T V Grattan, and H A El-Mikithai, (2000). Design of compact bends in semiconductor optical waveguides with low radiation and insertion loss. Semiconductor & Integrated Optoelectronics April, Cardiff.
  209. Rahman, B.M.A., Gomoluch, J.M., Anwar, N., Rajarajan, M. and Grattan, K.T.V. (2000). Characterization of semiconductor Bragg gratings for optical sensor applications. .
  210. Rajarajan, M., Obayya, S.S.A., Rahman, B.M.A., Grattan, K.T.V. and El-Mikati, H.A. (2000). Design and optimisation of compact optical bends. .
  211. Rahman, B.M.A., Obayya, S.S.A., Puah, P.A., Katrisku, F.A., Grattan, K.T.V. and El-Mikati, H.A. (2000). Modelling of axially non-uniform photonic devices using finite-element base vectorial BPM. .
  212. Rahman, B.M.A., Wongcharoen, T., Obayya, S.S.A., Rajarajan, M., Themistos, C., Somasiri, N., Anwar, N., El-Mikati, H.A. and Grattan, K.T.V. (2000). Rigorous analysis of photonic devices by using the finite element method. .
  213. Rahman, B.M.A., Wongcharoen, T., Rajarajan, M. and Grattan, K.T.V. (2000). Spot-size conversion and near-circular far-field profile for efficient laser-fiber coupling. .
  214. Rahman, B.M.A., Gomoluch, J.M., Rajarajan, M. and Grattan, K.T.V. (2000). Characterization of semiconductor Bragg gratings. .
  215. Rajarajan, M., Rahman, B.M.A., Grattan, K.T.V., Obayya, S.S.A. and El-Mikati, H.A. (2000). Design optimization of compact bends using finite element based numerical methods. .
  216. Rahman, B.A. (1999). Finite element modelling of photonic devices for DWDM optical communications. Invited paper for the 7th International Symposium on Recent Advances in Microwave Technology December, Malaga, Spain.
  217. Rahman, B.A., Katrisku, F.A. and Grattan, K.T.V. (1999). Modeling the effects of loss and fabrication error for second harmonic generation in semiconductor waveguides. EEE/OSA Topical Meeting on Nonlinear Guided Waves and Their Applications September, Dijon, France.
  218. Rahman, B.A., Anwar, N. and Grattan, K.T.V. (1999). The effect of elctrode design on an integrated-optic Mach-Zehnder interferrometer-based high-voltage sensor. presented at Sensors and their Application, IoP meeting September, Cardiff.
  219. Rajarajan, M., Rahman, B.M.A, , Grattan, K.T.V, , Obayya, S.S.A, and El-Mikati, H.A, (1999). Characterization of ultrashort low-loss waveguidebends for compact photonic integrated circuits. IEEE/OSA Topical Meeting on Integrated Photonic Research July, Santa Barbara.
  220. Rajarajan, M., Rahman, B.M.A, , Arasaratnam, P.K., , Grattan, K.T.V., , Wongcharoen, T., and Meyer, M., (1999). Transmission reflection alignment tolerance and far-field profiles of spot-size converters. IEEE/OSA Topical Meeting on Integrated Photonic Research July, Santa Barbara.
  221. Rahman, B.A., Rajarajan, M., Anwar, N., Themistos, C., Woncharoen, T. and Grattan, K.T.V. (1999). Finite element modelling of photonic devices. Photonics 99, Devices & Systems 21-23 June, Prague.
  222. Rahman, B.M.A., Plura, M. and Grattan, K.T.V. (1999). Accurate characterization of in-fiber gratings devices. 13th International Conference on Optical Fiber Sensors and Workshop on Device and System Technology Toward Future Optical Fiber Communication and Sensing (OFS-13) April, Kyongju, South Koera.
  223. Rahman, B.A., Obayya, S.S.A. and El-Mikati, H.A. (1999). Characterisation of 3-dimensional photonic devices using the finite element-based semi-vectorial BPM. Invited paper, PIERS March, Taiwan.
  224. Rahman, B.A., Rajarajan, M., Obayya, S.S.A., Fernandez, F.A. and Grattan, K.T.V. (1999). Leaky modes and radiation loss in bent optical waveguides. PIERS March, Taiwan.
  225. Rahman, B.A., Rajarajan, M., Obayya, S.S.A., Fernandez, F.A. and Grattan, K.T.V. (1999). Leaky modes and radiation loss in bent optical waveguides. PIERS March, Taiwan.
  226. Rahman, B.A., Buah, P.A. and Grattan, K.T.V. (1999). Two-dimensional transverse solitary wave optical memory. IEE Meeting on Optical Solitons 4 February.
  227. Rahman, B.A., Buah, P.A. and Grattan, K.T.V. (1999). Soliton train generation in a dual-channel mode-locked fiber laser. IEE Meeting on Optical Solitons 4 February.
  228. Rajarajan, M., Rahman, B.M.A, and Grattan, K.T.V., (1999). A novel approach for passive duplexers using the multimode interference devices. Integrated Optic Devices III,SPIE Photonics West 23-19 January, Sanjose, California, USA.
  229. Rahman, B.M.A., Plura, M., Gomoluch, J.M. and Grattan, K.T.V. (1999). Accurate characterization of Bragg grating-based optical devices. .
  230. Rajarajan, M., Meyer, M., Wongcharoen, T., Rahman, B.M.A. and Grattan, K.T.V. (1999). Design and characterization of spot-size expanders for improved laser-fiber coupling. .
  231. Rajarajan, M., Obayya, S.S.A., Rahman, B.M.A., Grattan, K.T.V. and El-Mikati, H.A. (1999). Novel polarization-independent optical bends for compact photonic integrated circuits. .
  232. Rajarajan, M., Obayya, S.S.A., Fernandez, F.A., Rahman, B.M.A. and Grattan, K.T.V. (1999). Rigorous study of leaky modes in optical waveguides. .
  233. Rahman, B.M.A., Arasaratnam, P., Kemper, M., Wongcharoen, T., Meyer, M., Rajarajan, M. and Grattan, K.T.V. (1999). Rigorous study of near and far fields for spot-size converted semiconductor lasers. .
  234. Buah, P.A., Rahman, B.M.A. and Grattan, K.T.V. (1999). Soliton train generation in a dual channel mode-locked fiber laser. .
  235. Buah, P.A., Rahman, B.M.A. and Grattan, K.T.V. (1999). Two-dimensional transverse solitary wave optical memory. .
  236. Rahman, B.M.A., Rajarajan, M., Wongcharoen, T., Katsriku, F.A., Themistos, C., Buah, P.A., Meyer, M. and Grattan, K.T.V. (1999). Rigorous characterisation of photonic devices using the finite element method. International Conference on Fiber Optics and Photonics (PHOTONICS-98) 14 Dec 1998 – 18 Dec 1998, New Delhi, India.
  237. Rajarajan, M., Rahman, B.M.A, , Wongcharoen, T, , Katsriku, F, , Buah, P.A, , Meyer, M, and Grattan, K.T.V, (1998). Rigorous characterisation of photonic devices using the finitelement method. Invited paper, Photonics India 98 14-18 December, Delhi, India.
  238. Rajarajan, M., Wongcharoen, T, , Rahman, B.M.A., and Grattan, K.T.V, (1998). Spot-size conversion using uniform waveguide sections for efficient laser-fibre coupling. Photonics- 98, IIT 14-18 December, Delhi, India.
  239. Rahman, B.A. and Obayya, S.S.A. (1998). Solution of axially non-uniform photonic devices using finite element based semi-vectorial BPM. Photonics 98 December, Delhi, India.
  240. Rajarajan, M., Rahman B.M.A, , Meyer, M, and Grattan, K.T.V, (1998). Rigorous study of the reflection coefficient from the butt-coupled spot-size expanded PIC-fibber junction. IEEE EDMO November, Manchester.
  241. Katsriku, F.A., Rahman, B.M.A. and Grattan, K.T.V. (1998). Numerical study of second harmonic generation in semiconductor waveguides. IEEE/OSA Topical Meeting: Nonlinear Optics: Materials, Fundamentals & Applications August, Hawaii.
  242. Anwar, N., Rahman, B.M.A. and Grattan, K.T.V. (1998). The effect of diffusion parameters on a Ti : LiNbO3 electro-optic directional coupler modulator. Applied Optics Divisional Conference of the Institute of Physics 16-19 May, Brighton, UK.
  243. Rahman, B.A. and Obayya, S.S.A. (1998). Elimination of modal birefringence in semiconductor optical waveguides. Semiconductor and Integrated Opto-Electronics Conference 6-8 April, Cardiff, UK.
  244. Rajarajan, M., Rahman, B.M.A, and Grattan, K.T.V, (1998). Design and Analysis of Optical Polarizers Incorporating MQW Waveguides. OSA/IEEE Integrated Photonics Research March, Victoria, Canada.
  245. Rahman, B.M.A., Rajarajan, M., Wongcharoen, T. and Grattan, K.T. (1998). Spot-size transformations for laser-fiber integration. Conference on Integrated Optic Devices II 28-30 January, San Jose, California.
  246. Rahman, B.M.A., Katsriku, F.A. and Grattan, K.T.V. (1998). Accurate modeling of second harmonic generation in optical waveguides. .
  247. Rarajaran, M., Rahman, B.M.A., Wongcharoen, T. and Grattan, K.T.V. (1998). Rigorous characterization of MMI-based photonic devices. .
  248. Rahman, B.A., Wongcharoen, T. and Grattan, K.T.V. (1997). Polarization corrected electrically tunable optical filters. IEEE EDMO Meeting November, London.
  249. Rahman, B.A., Themistos, C. and Grattan, K.T. (1997). Accurate solutions of sub-micron metal-clad optical fibers for optical scanning microscopes. Inst. Physics Congress 97 24-27 March, Leeds.
  250. Rajarajan, M., Rahman, B.M.A, , Wongcharoen, T, , Buah, P.A., , Mahmood, N, and Grattan, K.T.V, (1997). Rigorous Numerical Analysis of Non-Uniform Optical Guided-Wave Devices. Progress in Electromagnetic Research Symposium (PIERS) 6-9 January, Hong Kong.
  251. Rahman, B.A. (1997). Accurate characterization of optical waveguides by finite elements. Invited Paper, PIERS Conf. 6-9 January, Hong Kong.
  252. Rahman, B.A., Wongcharoen, T. and Grattan, K.T. (1996). Polarization independent narrow-band optical filters using nonsynchronous directional couplers. IoP meetings on Tunable optical filters and their applications 6 November, London.
  253. Wongcharoen, T., Buah, P.A., Rahman, B.M.A. and Grattan, K.T.V. (1996). Numerical modelling of electro-optic directional coupler based devices. Applied Optics Divisional Conference of the Institute of Physics 16-19 September, Reading, UK.
  254. Rajarajan, M., Buah, P.A., Wongcharoen, T., Rahman, B.M.A., Grattan, K.T.V., Schulz, D., Glingener, C. and Kopka, P. (1996). Modelling of Multimode Interference based power dividers using different numerical approaches. Applied Optics Conference, IoP September, Reading, UK.
  255. Rahman, B.A. (1996). Characterization photonic devices. Invited Paper, PIERS Conference July, Austria.
  256. Rahman, B.M.A. (1996). A review on the finite element characterization photonic devices using the finite element method. IEEE MELECON'96 May, Bari, Italy.
  257. Rahman, B.A., Mahmood, N. and Grattan, K.T.V. (1996). Accurate characterisation of Bragg filters. IoP Meeting 1 May.
  258. Rahman, B.A., Wongcharoen, T. and Grattan, K.T.V. (1996). Characterization of optical filters with two-dimensional confinement. IEEE/OSA Integrated Photonic Research April, Boston.
  259. Wongcharoen, T., Rahman, B.M.A. and Grattan, K.T.V. (1996). Accurate characterization of directional coupler-based devices. .
  260. Rajarajan, M., Rahman, B.M.A., Wongcharoen, T., Buah, P.A. and Grattan, K.T.V. (1996). Accurate characterization of multimode interference-based devices. .
  261. Anwar, N., Wongchareon, T., Katsriku, F.A., Rahman, B.M.A. and Grattan, K.T.V. (1996). Accurate model for a LiNbO3 electro-optic modulator. .
  262. Rahman, B.M.A., Rajarajan, M., Wongcharoen, T., Buah, P.A., Grattan, K.T.V., Perrone, G. and Montrosset, I. (1996). Computer modelling of photonic devices for optical measurements. .
  263. Wongcharoen, T., Rahman, B.M.A. and Grattan, K.T. (1995). Characterization of directional coupler-based optical guided-wave devices. 1995 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference 24-27 July, Rio de Janeiro, Brazil.
  264. Rahman, B.A., Wongcharoen, T., Grattan, K.T.V. and Palmer, A.W. (1995). Characterisation of optical filter using a nonsynchronous directional coupler. IEEE SICON/ICIE, IEEE Cat No. 95TH8061 July, Singapore.
  265. Rahman, B.A., Themistos, C. and Grattan, K.T.V. (1995). Finite element characterisation of optical waveguides with modal loss/gain. Invited Paper, Progress in Electromagnetics Symposium July, Seattle, USA.
  266. Rahman, B.A., Wongcharoen, T. and Grattan, K.T.V. (1995). Characterisation of directional coupler-based optical guided-wave devices. Progress in Electromagnetics Research Symposium July, Seattle, USA.
  267. Rahman, B.A., Wongcharoen, T. and Grattan, K.T.V. (1995). Characterisation of MQW photonic devices. Conf. Low Dimensional Structures and Devices May, Singapore.
  268. Rahman, B.A., Liu, Y., Yan, Y. and Grattan, K.T.V. (1995). Thermal modelling of MQW Intra-cavity VCSELs using the finite element method. SIOE'95, Paper 23 March, Cardiff.
  269. Rahman, B.M.A., Wongcharoen, T. and Grattan, K.T. (1995). Characterization of directional coupler-based optoelectronic devices. 3rd International Workshop on High Performance Electron Devices for Microwave and Optoelectronic Applications (EDMO 95) .
  270. NING, Y., LIU, Y., RAHMAN, B., GRATTAN, K. and PALMER, A. (1994). CONDITIONS FOR SUPPRESSING MODEL NOISE-INDUCED IN A WHITE-LIGHT INTERFEROMETER. 10th Optical Fiber Sensor Conf. October, Glasgow.
  271. Rahman, B.A., Buah, P.A. and Grattan, K.T.V. (1994). Finite element characterisation of nonlinear optical waveguides. Int. Symp. Guided-Wave Optoelectronics October, New York.
  272. Rahman, B.A., Woncharoen, T. and Grattan, K.T.V. (1994). Power coupling for electro-optic directional coupler switch. Int. Symp. Guided-Wave Optoelectronics October, New York.
  273. LIU, Y., MEGGITT, B., RAHMAN, B. and GRATTAN, K. (1994). FINITE-ELEMENT SIMULATION OF AN IN-FIBER INTERFEROMETRIC SYSTEM FOR HYDRAULIC PRESSURE MEASUREMENT APPLICATIONS. Second Int. Conf. on Opto-electronic Science and Engineering (ICOESE'94) 15-18 August, Beijing, China.
  274. Rahman, B.A. (1994). Characterisation of linear and nonlinear guided wave optoelectronics. Conf. Emerging Optoelectronics Tech. July, Bangalore, India.
  275. Buah, P.A., Catuneanu, M., Rahman, B.M.A. and Grattan, K.T.V. (1994). Numerical simulation of transverse effects in nonlinear optical fibers by finite elements. OSA/IEEE: CLEO'94 May, Anaheim, CA.
  276. Buah, P.A., Rahman, B.M.A. and Grattan, K.T.V. (1994). Soliton switching in an active three-core nonlinear fiber coupler. May.
  277. RAHMAN, B. and CHOWDHURY, M. (1994). FINITE-ELEMENT CHARACTERIZATION OF NONLINEAR MULTIPLE-QUANTUM-WELL STRUCTURES. April, Germany.
  278. BUAH, P., RAHMAN, B. and GRATTAN, K. (1994). NUMERICAL-SIMULATION OF PULSE-PROPAGATION IN NONLINEAR TAPERED WAVE-GUIDES. April, Germany.
  279. RAHMAN, B. and GUNATHEESON, M. (1994). STABILITY OF THE MODAL SOLUTIONS FOR NONLINEAR-OPTICAL WAVE-GUIDES USING THE FINITE-ELEMENT METHOD. April.
  280. Rahman, B.A., Wongcharoen, T. and Grattan, K.T.V. (1994). Power transfer variation between coupled waveguides with wavelength. COST 241 conference April, Nice, France.
  281. Rahman, B.A. (1994). CAD of Optoelectronics. Annual JFIT Conference 22-23 March, Edinburgh.
  282. Rahman, B.A., Wongcharoen, T. and Grattan, K.T.V. (1994). Optical filters and polarisers in MQW semiconductor coupled waveguides. Semiconductor and Integrated Opto-Electronics (SIOE) conference March, Cardiff.
  283. Rahman, B.A., Lepkowski, P. and Grattan, K.T.V. (1994). Thermal modelling of vertical cavity surface emitting lasers. SIOE conference March, Cardiff.
  284. Rahman, B.A., Liu, Y., Ning, Y.N., Grattan, K.T.V. and Palmer, A.W. (1994). Numerical study of three types of polarization maintaining fiber leads for current measurement applications. IEEE/OSA Integrated Photonic Research '94 San Francisco.
  285. Rahman, B.A. (1993). Computer aided characterisation of optoelectronic devices. IEEE Workshop EDMO'93, Paper B4 October, London.
  286. RAHMAN, B., BUAH, P. and GRATTAN, K. (1993). ANALYSIS OF SURFACE-PLASMONS IN EVANESCENT-WAVE FIBEROPTIC SENSORS USING THE FINITE-ELEMENT METHOD. September.
  287. WONGCHAROEN, T., RAHMAN, B. and GRATTAN, K. (1993). DESIGN AND CHARACTERIZATION OF OPTICAL DIRECTIONAL-COUPLERS USING THE FINITE-ELEMENT METHOD. IoP Conf. Sensors VI: Tech. Syst and their Applications September, Manchester.
  288. LIU, Y., RAHMAN, B. and GRATTAN, K. (1993). FINITE-ELEMENT ANALYSIS OF THE STRESS-DISTRIBUTION IN BOW-TIE OPTICAL FIBERS WITH SENSOR APPLICATION. IoP Conf. Sensors VI: Tech. Syst. and their Applications September.
  289. Rahman, B.A., Buah, P.A. and Grattan, K.T.V. (1993). A split-step finite element scheme for spatio-temporal analysis of pulse propagation in nonlinear waveguides. IEEE/OSA Nonlinear Guided Wave Phenomena September, Cambridge.
  290. Rahman, B.A., Grattan, K.T.V. and Buah, P. (1993). Study of transverse effects in optical bistable ring resonators using the finite element method. National QE-11 conference, paper 12 12 August, Belfast.
  291. Rahman, B.A. (1993). Finite element modelling of optical guided wave devices. Invited Paper, IEEE/SMBO Conf. August, Sao Paulo, Brazil.
  292. Rahman, B.A. and Grattan, K.T.V. (1993). Modelling in measurement of physical phenomena, using optical techniques. Invited Paper, Modelling in Measurement process Conference June, Wroclaw, Poland.
  293. Rahman, B.A. and et al., (1992). Accurate finite element analysis of nonlinear optical fibres. IEEE/OSA Conference on Nonlinear Optics: Materials, Fundamentals, & Applications August, Hawaii.
  294. Rahman, B.A., Buah, P.A. and Grattan, K.T.V. (1992). Accurate finite element analysis of polarization-maintaining optical fibres. IEEE/OSA Integrated Photonic Research Digest 13-16 April, New Orleans.
  295. Rahman, B.A., Fernandez, F.A., Ettinger, R.D. and Davies, J.B. (1991). Accurate finite element software for microwave and optical waveguides. IEE International Conference on Computation in Electromagnetics 26-27 November, London, England.
  296. Rahman, B.A. and et al., (1991). Finite element analysis of two-transverse-dimensional bistable nonlinear integrated optical waveguides. IEEE/OSA Nonlinear Guided-wave Phenomenoa Topical Meeting 2-4 September, Cambridge, England.
  297. Rahman, B.A. and et al., (1991). Finite element modal analysis of self-defocusing nonlinear optical limiter. Int. Microwave Conf. (IEEE), SMBO'91 July, Brazil.
  298. Rahman, B.A. and Davies, J.B. (1991). Finite element analysis of optical waveguides with arbitrary refractive index profiles and arbitrary nonlinearities. IoP Meeting on Nonlinear Optical Waveguides 29 May, London.
  299. Rahman, B.A. and et al., (1991). Computer modelling of abrupt power-induced transverse switching in nonlinear strip waveguide. IEEE/OSA CLEO'91 ( Conf. Lasers & Electro-optics) 12-17 May, Baltimore.
  300. Rahman, B.A., Fernandez, F.A. and et al., (1991). A numerical study of the quasi-TE mode in optical waveguide with saturable nonlinear rectangular core. IEEE/OSA Integrated Photonics Research Digest ,Topical Meeting 9-12 April, Monterey.
  301. Rahman, B.A. and et al., (1991). Accurate finite element modelling of optical fibre propagation characteristics for sensors. IoP Conf. On: Sensors V: Technology, Systems and Applications Edinburgh.
  302. Rahman, B.A. (1990). Finite element analysis of nonlinear optical devices. Inst. of Physics (IoP) Conf. on Applied Optics and Opto-Electronics Conference 17-20 September, Nottingham.
  303. Rahman, B.A., Koch, T.B. and et al., (1990). Electromagnetic field propagation in integrated optical devices of arbitrary transverse and longitudinal geometry. Invited paper in Int. Conf. on Electromagnetic Field Computation and TEAM workshop 23-25 April, Oxford.
  304. Rahman, B.A. (1989). Finite element solution of nonlinear optical waveguides. September, Boston.
  305. Rahman, B.A. (1989). Finite element modelling of opto-electronic devices. IEE/I. Phy. Conf on 'Optoelectronic Devices' 1-2 June, Glasgow.
  306. Rahman, B.A., Davies, J.B. and et al., (1989). Variational and Finite element solutions of TE modes in waveguides with nonlinear material. URSI National Radio Science Meeting 4-6 January, Boulder, Colorado.
  307. Rahman, B.A. and Davies, J.B. (1988). Analysis of waveguide containing arbitrary nonlinear materials. IEE Colloquium on 'Nonlinear Optical waveguides' IEE Digest No. 1988/88 2 June.
  308. Rahman, B.A. and Davies, J.B. (1987). Analyses of Discontinuities in Optical Waveguides. 1987 IEEE MTT- Int. Microwave Symposium Digest 9-11 June, Las Vegas, Nevada.
  309. Rahman, B.A. and Davies, J.B. (1983). Analysis of open optical and microwave guides of arbitrary transverse permittivity profiles. URSI Int. symp. on Electromagnetic Theory 23-26 August, Santiago, Spain.
  310. Rahman, B.A. (1983). Analysis of Optical and Microwave Waveguides by Finite Elements. Colloquium on “'Recent developments in high frequency electromagnetic field analysis by finite element methods”, IEE Digest No. 1983/48 16 May.

Journal Articles (221)

  1. Emami, S.D., Jing, L.H., Rahman, M.M., Abdullah, F., Abdul-Rashid, H.A., Dashtabi, M.M. and Azizur Rahman, B.M. (2017). Evolution of Surface Acoustic Waves in an Optical Microfiber. IEEE Journal of Quantum Electronics, 53(5) . doi:10.1109/JQE.2017.2747152.
  2. Viphavakit, C., Patchoo, W., Boonruang, S., Themistos, C., Komodromos, M., Mohammed, W.S. and Rahman, B.M.A. (2017). Demonstration of Polarization-Independent Surface Plasmon Resonance Polymer Waveguide for Refractive Index Sensing. JOURNAL OF LIGHTWAVE TECHNOLOGY, 35(14), pp. 3012–3019. doi:10.1109/JLT.2017.2711959.
  3. Pan, C. and Rahman, B.M.A. (2017). High-Sensitivity Polarization-Independent Biochemical Sensor Based on Silicon-on-Insulator Cross-Slot Waveguide. IEEE Journal on Selected Topics in Quantum Electronics, 23(2) . doi:10.1109/JSTQE.2016.2594094.
  4. Ghosh, S. and Rahman, B.M.A. (2017). An Innovative Straight Resonator Incorporating a Vertical Slot as an Efficient Bio-Chemical Sensor. IEEE Journal on Selected Topics in Quantum Electronics, 23(2) . doi:10.1109/JSTQE.2016.2630299.
  5. Habib, K., Jiang, W., Rahman, B.M.A. and Grattan, K.T.V. (2017). Energy efficiency of iron-boron-silicon metallic glasses in sulfuric acid solutions. Materials Research Express, 4(3) . doi:10.1088/2053-1591/aa60dc.
  6. Aming, A., Uthman, M., Chitaree, R., Mohammed, W. and Rahman, B.M.A. (2016). Design and Characterization of Porous Core Polarization Maintaining Photonic Crystal Fiber for THz Guidance. JOURNAL OF LIGHTWAVE TECHNOLOGY, 34(23), pp. 5583–5590. doi:10.1109/JLT.2016.2623657.
  7. Soudi, S. and Rahman, B.M.A. (2016). Design of a Compact Polarization Splitter by Using Identical Coupled Silicon Nanowires. Journal of Lightwave Technology, 34(17), pp. 4168–4177. doi:10.1109/JLT.2016.2577341.
  8. Soltanian, M.R.K., Sharbirin, A.S., Ariannejad, M.M., Amiri, I.S., De La Rue, R.M., Brambilla, G., Rahman, B.M.A., Grattan, K.T.V. and Ahmad, H. (2016). Variable Waist-Diameter Mach-Zehnder Tapered-Fiber Interferometer as Humidity and Temperature Sensor. IEEE Sensors Journal, 16(15), pp. 5987–5992. doi:10.1109/JSEN.2016.2573961.
  9. Mishra, J.K., Rahman, B.M.A. and Priye, V. (2016). Rectangular Array Multicore Fiber Realizing Low Crosstalk Suitable for Next-Generation Short-Reach Optical Interconnects with Low Misalignment Loss. IEEE Photonics Journal, 8(4) . doi:10.1109/JPHOT.2016.2591002.
  10. Barh, A., Varshney, R.K., Pal, B.P., Agrawal, G.P. and Rahman, B.M.A. (2016). Design of a Polymer-Based Hollow-Core Bandgap Fiber for Low-Loss Terahertz Transmission. IEEE Photonics Technology Letters, 28(15), pp. 1703–1706. doi:10.1109/LPT.2016.2544198.
  11. Mishra, J.K., Priye, V. and Rahman, B.M.A. (2016). Augmenting data rate performance for higher order modulation in triangular index profile multicore fiber interconnect. Optics Communications, 371, pp. 40–46. doi:10.1016/j.optcom.2016.03.038.
  12. Raghuwanshi, S.K. and Rahman, B.M.A. (2016). Modeling of single mode optical fiber having a complicated refractive index profile by using modified scalar finite element method. Optical and Quantum Electronics, 48(7) . doi:10.1007/s11082-016-0632-9.
  13. Hada, S.L. and Rahman, B.M.A. (2016). Rigorous analysis of numerical methods: a comparative study. Optical and Quantum Electronics, 48(6) . doi:10.1007/s11082-016-0579-x.
  14. Jiang, W., Kohli, N., Sun, X. and Rahman, B.M.A. (2016). Multi-Poly-Silicon-Layer-Based Spot-Size Converter for Efficient Coupling between Silicon Waveguide and Standard Single-Mode Fiber. IEEE Photonics Journal, 8(3) . doi:10.1109/JPHOT.2016.2577594.
  15. Pan, C. and Rahman, B.M.A. (2016). Compact Polarization-Independent MMI-Based 1 × 2 Power Splitter Using Metal-Cap Silicon-on-Insulator Waveguide. IEEE Photonics Journal, 8(3) . doi:10.1109/JPHOT.2016.2564926.
  16. Pan, C. and Rahman, B.M.A. (2016). Accurate Analysis of the Mode (de)multiplexer Using Asymmetric Directional Coupler. Journal of Lightwave Technology, 34(9), pp. 2288–2296. doi:10.1109/JLT.2016.2530852.
  17. Viphavakit, C., Boonruang, S., Themistos, C., Komodromos, M., Mohammed, W.S. and Rahman, B.M.A. (2016). Surface plasmon resonance-enhanced light interaction in an integrated ormocomp nanowire. Optical and Quantum Electronics, 48(5) . doi:10.1007/s11082-016-0499-9.
  18. Rahman, B.M.A. and Rahman, M.M. (2016). Characterization of acousto-optical interaction in planar silica optical waveguide by the finite element method. Journal of the Optical Society of America B: Optical Physics, 33(5), pp. 810–818. doi:10.1364/JOSAB.33.000810.
  19. Karim, M.R. and Rahman, B.M.A. (2016). Ultra-broadband mid-infrared supercontinuum generation using chalcogenide rib waveguide. Optical and Quantum Electronics, 48(3), pp. 1–10. doi:10.1007/s11082-016-0458-5.
  20. Barh, A., Pal, B.P., Agrawal, G.P., Varshney, R.K. and Rahman, B.M.A. (2016). Specialty Fibers for Terahertz Generation and Transmission: A Review. IEEE Journal on Selected Topics in Quantum Electronics, 22(2) . doi:10.1109/JSTQE.2015.2494537.
  21. Kejalakshmy, N.T., Grattan, K.T.V. and Rahman, B.M.A. (2016). Investigation of the Optical Modal Properties of Al+3 Doped ZnO-Coated Au Waveguide for Gas Sensing Applications Using the Finite Element Method. IEEE Sensors Journal, 16(5), pp. 1176–1181. doi:10.1109/JSEN.2015.2498943.
  22. Kumar, S., Raghuwanshi, S.K. and Rahman, B.M.A. (2015). Design of universal shift register based on electro-optic effect of LiNbO<inf>3</inf> in Mach–Zehnder interferometer for high speed communication. Optical and Quantum Electronics, 47(11), pp. 3509–3524. doi:10.1007/s11082-015-0226-y.
  23. Karim, M.R., Rahman, B.M.A., Zabi, Y.O.A., Agrawal, A. and Grawal, G.P.A. (2015). Ultrabroadband mid-infrared supercontinuum generation through dispersion engineering of chalcogenide microstructured fibers. Journal of the Optical Society of America B: Optical Physics, 32(11), pp. 2343–2351. doi:10.1364/JOSAB.32.002343.
  24. Raghuwanshi, S.K., Jindal, S.K. and Rahman, B.M.A. (2015). Realization of MOEMS based temperature sensor using externally modulated LINBO3 Mach Zehnder interferometer. Sensor Letters, 13(9), pp. 756–763. doi:10.1166/sl.2015.3514.
  25. Kumar, S., Raghuwanshi, S.K. and Rahman, B.M.A. (2015). Design of universal shift register based on electro-optic effect of LiNbO3 in Mach–Zehnder interferometer for high speed communication. Optical and Quantum Electronics . doi:10.1007/s11082-015-0226-y.
  26. Raghuwanshi, S.K. and Rahman, B.M.A. (2015). Analysis of novel chirped types of refractive index profile metamaterial planar slab optical waveguide by finite-element method for sensor application. IEEE Sensors Journal, 15(7), pp. 4141–4147. doi:10.1109/JSEN.2015.2415831.
  27. Barh, A., Varshney, R.K., Agrawal, G.P., Rahman, B.M.A. and Pal, B.P. (2015). Plastic fiber design for THz generation through wavelength translation. Optics Letters, 40(9), pp. 2107–2110. doi:10.1364/OL.40.002107.
  28. Sriratanavaree, S., Kejalakshmy, N., Leung, D.M.H., Rahman, B.M.A. and Grattan, K.T.V. (2015). Rigorous analysis of acoustic modes in low and high index contrast silica fibers. Applied Optics, 54(9), pp. 2550–2557. doi:10.1364/AO.54.002550.
  29. Karim, M.R., Rahman, B.M.A. and Agrawal, G.P. (2015). Mid-infrared supercontinuum generation using dispersion-engineered Ge11:5As24Se64:5 chalcogenide channel waveguide. Optics Express, 23(5), pp. 6903–6914. doi:10.1364/OE.23.006903.
  30. Viphavakit, C., Komodromos, M., Themistos, C., Mohammed, W.S., Kalli, K. and Rahman, B.M.A. (2015). Optimization of a horizontal slot waveguide biosensor to detect DNA hybridization. Applied Optics, 54(15), pp. 4881–4888. doi:10.1364/AO.54.004881.
  31. Raghuwanshi, S.K. and Azizur Rahman, B.M. (2015). Propagation and characterization of novel graded and linearly chirped type's of refractive index profile symmetric planar slab waveguide by numerical means. Progress In Electromagnetics Research B, 62(1), pp. 255–275. doi:10.2528/PIERB15021605.
  32. Mishra, J.K., Priye, V. and Rahman, B.M.A. (2015). Error probability performance of a short-reach multicore fiber optical interconnect transmission system. Optics Letters, 40(19), pp. 4556–4559. doi:10.1364/OL.40.004556.
  33. Raghuwanshi, S.K., Rahman, B.M.A. and Sivaganesh, A. (2015). A simple analytical model to study of six wave fiber optical parametric amplifier characteristics. Optik, 126(24), pp. 5280–5286. doi:10.1016/j.ijleo.2015.09.122.
  34. Raiyan Kabir, S.M., Rahman, B.M.A. and Grattan, K.T.V. (2015). Speeding beyond FDTD, perforated finite element time domain method for 3D electromagnetics. Progress In Electromagnetics Research B, 64(1), pp. 171–193. doi:10.2528/PIERB15081902.
  35. Soudi, S. and Rahman, B.M.A. (2014). Design of compact polarization rotator using simple silicon nanowires. APPLIED OPTICS, 53(34), pp. 8071–8077. doi:10.1364/AO.53.008071.
  36. Sriratanavaree, S., Rahman, B.M.A., Leung, D.M.H., Kejalakshmy, N. and Grattan, K.T.V. (2014). Full-vectorial finite-element analysis of acoustic modes in silica waveguides. IEEE Journal of Quantum Electronics, 50(12), pp. 1006–1013. doi:10.1109/JQE.2014.2364199.
  37. Viphavakit, C., Atthi, N., Boonruang, S., Themistos, C., Komodromos, M., Mohammed, W.S. and Rahman, B.M.A. (2014). Realization of a polymer nanowire optical transducer by using the nanoimprint technique. APPLIED OPTICS, 53(31), pp. 7487–7497. doi:10.1364/AO.53.007487.
  38. Sriratanavaree, S., Rahman, B.M.A., Leung, D.M.H., Kejalakshmy, N. and Grattan, K.T.V. (2014). Rigorous characterization of acoustic-optical interactions in silicon slot waveguides by fullvectorial finite element method. Optics Express, 22(8), pp. 9528–9537. doi:10.1364/OE.22.009528.
  39. Rahman, B.M.A., Markides, C., Uthman, M., Quadir, A., Kejalakshmy, N. and Themistos, C. (2014). Characterization of low-loss waveguides and devices for terahertz radiation. Optical Engineering, 53(3) . doi:10.1117/1.OE.53.3.031210.
  40. Rahman, B.M.A., Themistos, C., Tanvir, H., Uthman, M., Quadir, A. and Markides, C. (2014). Emergence of T-Rays: Design of low-loss waveguides and devices. International Journal of Microwave and Optical Technology, 9(1), pp. 1–5.
  41. Viphavakit, C., Atthi, N., Boonruang, S., Themistos, C., Mohammed, W.S., Kalli, K., Rahman, B.M.A. and Komodromos, M. (2014). Characterization of polymer nanowires fabricated using the nanoimprint method. Proceedings of SPIE - The International Society for Optical Engineering, 9126 . doi:10.1117/12.2052276.
  42. Rahman, B.M.A., Rahman, M.M., Sriratanavaree, S., Kejalakshmy, N. and Grattan, K.T.V. (2014). Rigorous analysis of the transverse acoustic modes in optical waveguides by exploiting their structural symmetry. Applied Optics, 53(29), pp. 6797–6803. doi:10.1364/AO.53.006797.
  43. Azizur Rahman, B.M., Kejalakshmy, N., Viphavakit, C., Themistos, C., Rajarajan, M. and Grattan, K.T.V. (2014). Rigorous design and optimization of a new generation of optical sensors. Journal of the Indian Institute of Science, 94(3), pp. 245–260.
  44. Karim, M.R., Rahman, B.M.A. and Agrawal, G.P. (2014). Dispersion engineered Ge11:5As24Se64:5 nanowire for supercontinuum generation: A parametric study. Optics Express, 22(25), pp. 31029–31040. doi:10.1364/OE.22.031029.
  45. Barh, A., Rahman, B.M.A., Varshney, R.K. and Pal, B.P. (2013). An efficient polarization converter for Mid-IR wavelength. Optics InfoBase Conference Papers .
  46. Raiyan Kabir, S.M. and Rahman, B.M.A. (2013). Computationally efficient dual perforated finite element time domain method. Optics InfoBase Conference Papers .
  47. Rahman, B.M.A., Sriratanavaree, S., Kejalakshmy, N. and Leung, D.M.H. (2013). Interactions of acoustic and optical waves in silicon slot waveguides. Optics InfoBase Conference Papers .
  48. Rahman, B.M.A., Leung, D.M.H., Kejalakshmy, N. and Ip, L.T. (2013). Novel silicon cross-slot optical waveguide for polarization diversity applications. Optics InfoBase Conference Papers .
  49. Rahman, B.M.A., Leung, D.M.H., Kejalakshmy, N. and Ip, L.T. (2013). Novel silicon cross-slot optical waveguide for polarization diversity applications. Optics InfoBase Conference Papers .
  50. Rahman, B.M.A., Leung, D.M.H., Kejalakshmy, N. and Ip, L.T. (2013). Novel silicon cross-slot optical waveguide for polarization diversity applications. Optics InfoBase Conference Papers .
  51. Rahman, B.M.A., Leung, D.M.H., Kejalakshmy, N. and Ip, L.T. (2013). Novel silicon cross-slot optical waveguide for polarization diversity applications. Optics InfoBase Conference Papers .
  52. Barh, A., Rahman, B.M.A., Varshney, R.K. and Pal, B.P. (2013). Design and performance study of a compact SOI polarization rotator at 1.55 μm. Journal of Lightwave Technology, 31(23), pp. 3687–3693. doi:10.1109/JLT.2013.2286859.
  53. Rahman, B.M.A., Uthman, M., Quadir, A., Kejalakshmy, N., Markides, C. and Themistos, C. (2013). Low-loss waveguides and devices for compact THz systems. Proceedings of SPIE - The International Society for Optical Engineering, 8716 . doi:10.1117/12.2017622.
  54. Rahman, B.M.A., Themistos, C., Tanvir, H., Uthman, M., Quadir, A. and Markides, C. (2013). Low-loss waveguides for THz guidance and devices. Proceedings of SPIE - The International Society for Optical Engineering, 8624 . doi:10.1117/12.2008201.
  55. Wijeratne, I.N.M., Kejalakshmy, N., Rahman, B.M.A. and Grattan, K.T.V. (2013). Rigorous full-vectorial beam propagation analysis of second-harmonic generation in zinc oxide waveguides. IEEE Photonics Journal, 5(2) . doi:10.1109/JPHOT.2013.2256115.
  56. Raiyan Kabir, S.M., Rahman, B.M.A., Agrawal, A. and Grattan, K.T.V. (2013). Elimination of numerical dispersion from electromagnetic time domain analysis by using resource efficient finite element technique. Progress in Electromagnetics Research, 137, pp. 487–512. doi:10.2528/PIER13012305.
  57. Tanvir, H., Rahman, B.M.A. and Grattan, K.T.V. (2013). A higher order lateral mode suppression scheme for terahertz quantum cascade laser waveguides. IEEE Journal on Selected Topics in Quantum Electronics, 19(1) . doi:10.1109/JSTQE.2012.2210149.
  58. Markides, C., Themistos, C., Tanvir, H., Rahman, B.M.A. and Grattan, K.T.V. (2013). Multimode interference 3 dB splitters in hollow core metallic waveguides for low-loss THZ wave transmission. IEEE Journal on Selected Topics in Quantum Electronics, 19(1) . doi:10.1109/JSTQE.2012.2215018.
  59. Agrawal, A., Azabi, Y. and Rahman, B. (2013). Stacking the Equiangular Spiral. IEEE Photonics Technology Letters, (99) . doi:10.1109/LPT.2012.2236309.
  60. Agrawal, A., Tiwari, M., Azabi, Y.O., Janyani, V., Rahman, B.M.A. and Grattan, K.T.V. (2013). Ultrabroad supercontinuum generation in tellurite equiangular spiral photonic crystal fiber. Journal of Modern Optics .
  61. Viphavakit, C., Themistos, C., Komodromos, M., Kalli, K., Quadir, A. and Rahman, B.A. (2013). Dispersion characteristics of plasmonic waveguides for THz waves. Proceedings of SPIE, 8775 . doi:10.1117/12.2021785.
  62. Dar, T., Homola, J., Rahman, B.M.A. and Rajarajan, M. (2012). Label-free slot-waveguide biosensor for the detection of DNA hybridization. Appl Opt, 51(34), pp. 8195–8202.
  63. Jasim, A.A., Harun, S.W., Lim, K.S., Rahman, B.M.A. and Ahmad, H. (2012). Microfibre Mach-Zehnder interferometer and its application as a current sensor. IET OPTOELECTRONICS, 6(6), pp. 298–302. doi:10.1049/iet-opt.2012.0025.
  64. Rahman, B.M.A., Leung, D.M.H., Kejalakshmy, N., Agrawal, A. and Grattan, K.T.V. (2012). Finite element solutions of nanophotonics devices. AIP Conference Proceedings, 1504, pp. 1283–1286. doi:10.1063/1.4772164.
  65. Uthman, M., Rahman, B.M.A., Kejalakshmy, N., Agrawal, A. and Grattan, K.T.V. (2012). Design and characterization of low-loss porous-core photonic crystal fiber. IEEE Photonics Journal, 4(6), pp. 2315–2325. doi:10.1109/JPHOT.2012.2231939.
  66. Rahman, B.M.A., Leung, D.M.H. and Grattan, K.T.V. (2012). Light guidance in low-index slot-waveguides. 2012 7th International Conference on Electrical and Computer Engineering, ICECE 2012 pp. 506–509. doi:10.1109/ICECE.2012.6471598.
  67. Barh, A., Pal, B.P., Varshney, R.K. and Rahman, B.M.A. (2012). Design of a compact SOI polarization rotator for mid-IR application. CODEC 2012 - 5th International Conference on Computers and Devices for Communication . doi:10.1109/CODEC.2012.6509320.
  68. Rahman, B.M.A., Themistos, C., Quadir, A., Uthman, M., Markides, C., Tanvir, H. and Grattan, K.T.V. (2012). Design optimization of low-loss waveguides and devices for THz systems. 2012 International Conference on Fiber Optics and Photonics, PHOTONICS 2012 .
  69. Azabi, Y., Agrawal, A., Rahman, B.M.A. and Grattan, K.T.V. (2012). Residual dispersion compensation with a spiral PCF. Optics InfoBase Conference Papers .
  70. Tanvir, H., Rahman, B.M.A. and Grattan, K.T.V. (2012). Suppressing mode competition in terahertz quantum cascade lasers. Integrated Photonics Research, Silicon and Nanophotonics, IPRSN 2012 .
  71. Themistos, C., Markides, C., Rahman, B.M.A. and Grattan, K.T.V. (2012). Characterization of microstrips for THz waves. 2012 IEEE International Conference on Electron Devices and Solid State Circuit, EDSSC 2012 . doi:10.1109/EDSSC.2012.6482869.
  72. Themistos, C., Kalli, K., Komodromos, M., Markides, C., Quadir, A., Azizur Rahman, B.M. and Grattan, K.T.V. (2012). Low-loss multimode interference couplers for terahertz waves. Proceedings of SPIE - The International Society for Optical Engineering, 8426 . doi:10.1117/12.925655.
  73. Kumar, A., Rastogi, V., Agrawal, A. and Rahman, B.M.A. (2012). Birefringence analysis of segmented cladding fiber. APPLIED OPTICS, 51(15), pp. 3104–3108. doi:10.1364/AO.51.003104.
  74. Rahman, B.M.A., Leung, D.M.H., Ahsan, S.N., Tan, P. and Grattan, K.T.V. (2012). Light guidance through void: Silicon slot waveguides and their rigorous characterization. Proceedings of SPIE - The International Society for Optical Engineering, 8265 . doi:10.1117/12.910801.
  75. Wijeratne, I.N.M., Kejalakshmy, N., Agrawal, A., Rahman, B.M.A. and Grattan, K.T.V. (2012). Numerical analysis of second harmonic generation in soft glass equiangular spiral photonic crystal fibers. IEEE Photonics Journal, 4(2), pp. 357–368. doi:10.1109/JPHOT.2012.2186795.
  76. Uthman, M., Rahman, B.M.A., Kejalakshmy, N., Agrawal, A., Abana, H. and Grattan, K.T.V. (2012). Stabilized large mode area in tapered photonic crystal fiber for stable coupling. IEEE Photonics Journal, 4(2), pp. 340–349. doi:10.1109/JPHOT.2012.2188788.
  77. Leung, D.M.H., Kejalakshmy, N., Rahman, B.M.A. and Grattan, K.T.V. (2012). Rigorous numerical analysis and characterization of a silicon vertical-slot nano-waveguide. Journal of Nonlinear Optical Physics and Materials, 21(1) . doi:10.1142/S0218863512500075.
  78. Agrawal, A., Kejalakshmy, N., Uthman, M., Rahman, B.M.A., Kumar, A. and Grattan, K.T.V. (2012). Ultra low bending loss equiangular spiral photonic crystal fibers in the terahertz regime. AIP Advances, 2 . doi:10.1063/1.4726055.
  79. Rahman, B.M.A., Uthman, M., Kejalakshmy, N., Agrawal, A. and Grattan, K.T.V. (2011). Design of bent photonic crystal fiber supporting a single polarization. Applied Optics, 50(35), pp. 6505–6511.
  80. Tanvir, H., Rahman, B.M.A. and Grattan, K.T.V. (2011). Higher order lateral mode suppression schemes for edge emitting terahertz quantum cascade laser waveguides. IRMMW-THz 2011 - 36th International Conference on Infrared, Millimeter, and Terahertz Waves . doi:10.1109/irmmw-THz.2011.6104997.
  81. Tanvir, H., Rahman, B.M.A. and Grattan, K.T.V. (2011). Ghost modes in Terahertz Quantum Cascade Laser waveguides. IRMMW-THz 2011 - 36th International Conference on Infrared, Millimeter, and Terahertz Waves . doi:10.1109/irmmw-THz.2011.6104778.
  82. Leung, D.M.H., Kan, X.B., Rahman, B.M.A., Kejalakshmy, N. and Grattan, K.T.V. (2011). Optimizing the power confinement in silicon slot waveguides by use of Finite Element Method. Proceedings of SPIE - The International Society for Optical Engineering, 8307 . doi:10.1117/12.904947.
  83. Rahman, B.M.A., Kejalakshmy, N., Agrawal, A., Uthman, M., Wijeratne, I.N.M. and Grattan, K.T.V. (2011). Finite element characterisation of photonic crystal fibers. SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference Proceedings pp. 660–664. doi:10.1109/IMOC.2011.6169248.
  84. Rahman, B.M.A., Leung, D.M.H., Kejalakshmy, N. and Grattan, K.T.V. (2011). Rigorous characterization of silicon nanowires and slot waveguides. SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference Proceedings pp. 268–272. doi:10.1109/IMOC.2011.6169227.
  85. Rahman, B.M.A., Quadir, A., Tanvir, H. and Grattan, K.T.V. (2011). Low-loss dielectric-coated hollow rectangular plasmonic waveguide supporting THz guidance. Optics InfoBase Conference Papers .
  86. Leung, D.M.H., Kan, X.B., Rahman, B.M.A., Kejalakshmy, N. and Grattan, K.T.V. (2011). Optimizing the power confinement in silicon slot waveguides by use of finite element method. Optics InfoBase Conference Papers .
  87. Rahman, B.M.A., Quadir, A., Tanvir, H. and Grattan, K.T.V. (2011). Characterization of plasmonic modes in a low-loss dielectric-coated hollow core rectangular waveguide at terahertz frequency. IEEE Photonics Journal, 3(6), pp. 1054–1066. doi:10.1109/JPHOT.2011.2173326.
  88. Tanvir, H., Rahman, B.M.A. and Grattan, K.T.V. (2011). Impact of "ghost" mode interaction in terahertz quantum cascade lasers. IEEE Photonics Journal, 3(5), pp. 926–935. doi:10.1109/JPHOT.2011.2170157.
  89. Lim, K.S., Jasim, A.A., Damanhuri, S.S.A., Harun, S.W., Rahman, B.M.A. and Ahmad, H. (2011). Resonance condition of a microfiber knot resonator immersed in liquids. APPLIED OPTICS, 50(30), pp. 5912–5916. doi:10.1364/AO.50.005912.
  90. Namassivayane, K., Tanvir, H., Quadir, A., Rahman, A.B.M. and Grattan, K.T.V. (2011). Study of modal properties in gold nanowire with ZnO cladding by using the finite element method. Applied Optics, 50(25) . doi:10.1364/AO.50.00E177.
  91. Agrawal, A., Kejalakshmy, N., Uthman, M., Rahman, B.M.A. and Grattan, K.T.V. (2011). Ultra low bending loss spiral photonic crystal fibers in terahertz regime. 2011 Conference on Lasers and Electro-Optics: Laser Science to Photonic Applications, CLEO 2011 .
  92. Tanvir, H., Rahman, B.M.A., Kejalakshmy, N., Agrawal, A. and Grattan, K.T.V. (2011). Evolution of highly confined surface plasmon modes in terahertz quantum cascade laser waveguides. Journal of Lightwave Technology, 29(14), pp. 2116–2125. doi:10.1109/JLT.2011.2152364.
  93. Leung, D.M.H., Rahman, B.M.A., Kejalakshmy, N. and Grattan, K.T.V. (2011). Rigorous Full-Vectorial Solutions of Photonics Nanowires. IEEE J SEL TOP QUANT, 17(4), pp. 952–959. doi:10.1109/JSTQE.2010.2089973.
  94. Leung, D.M.H., Rahman, B.M.A. and Grattan, K.T.V. (2011). Numerical Analysis of Asymmetric Silicon Nanowire Waveguide as Compact Polarization Rotator. IEEE PHOTONICS J, 3(3), pp. 381–389. doi:10.1109/JPHOT.2011.2140098.
  95. Rahman, B.M.A., Tanvir, H., Kejalakshmy, N., Quadir, A. and Grattan, K.T.V. (2011). Rigorous characterization of surface plasmon modes by using the finite element method. Proceedings of SPIE - The International Society for Optical Engineering, 7941 . doi:10.1117/12.876959.
  96. Uddin, M.A., Chan, H.P. and Rahman, B.M.A. (2010). STRUCTURAL IMPROVEMENT OF ORGANIC PHOTOVOLTAIC CELL (OPVC) TOWARDS HIGHER EFFICIENCY. REVIEWS ON ADVANCED MATERIALS SCIENCE, 26(1-2), pp. 58–66.
  97. Leung, D.M.H., Rahman, B.M.A., Tanvir, H., Ashraf, M.A., Kejalakshmy, N. and Kabir, R. (2010). Characterization of silicon nanowires. ICECE 2010 - 6th International Conference on Electrical and Computer Engineering pp. 438–441. doi:10.1109/ICELCE.2010.5700723.
  98. Leung, D.M.H., Rahman, B.M.A., Ashraf, M.A., Tanvir, H., Kejalakshmy, N., Agrawal, A., Kabir, R. and Grattan, K.T.V. (2010). Characterization of nanoscale silicon photonic devices. Optics InfoBase Conference Papers .
  99. Rahman, B.M.A., Leung, D.M.H., Namassivayane, K., Agrawal, A., Ashraf, M., Tanvir, H. and Grattan, K.T.V. (2010). Rigorous characterization of silicon nanowire for compact nanophotonic devices. Proceedings of SPIE - The International Society for Optical Engineering, 7719 . doi:10.1117/12.849389.
  100. Rahman, B.M.A., Kejalakshmy, N., Tanvir, H., Quadir, A. and Grattan, K.T.V. (2010). Rigorous characterization of surface plasmon modes by using the finite element method. Proceedings of SPIE - The International Society for Optical Engineering, 7712 . doi:10.1117/12.849392.
  101. Kejalakshmy, N., Agrawal, A., Aden, Y., Leung, D.M.H., Rahman, B.M.A. and Grattan, K.T.V. (2010). Characterization of silicon nanowire by use of full-vectorial finite element method. Appl Opt, 49(16), pp. 3173–3181.
  102. Agrawal, A., Kejalakshmy, N., Rahman, B.M.A. and Grattan, K.T.V. (2010). Polarization and dispersion properties of elliptical hole golden spiral photonic crystal fiber. APPLIED PHYSICS B-LASERS AND OPTICS, 99(4), pp. 717–726. doi:10.1007/s00340-010-4023-9.
  103. Grattan, K.T., Leung, D.M.H., Kejalakshmy, N., Rahman, B.M.A. and et al., (2010). Rigorous modal analysis of silicon strip nanoscale waveguides. OPTICS EXPRESS, 18(8), pp. 8528–8539.
  104. Leung, D.M.H., Rahman, B.M.A., Kejalakshmy, N. and Grattan, K.T.V. (2010). Characterization of silicon nanophotonic devices using the finite element method. Optical and Quantum Electronics pp. 1–11.
  105. Grattan, K.T., Themistos, C., Rajarajan, M., Rahman, B.M.A. and et al., (2009). Characterization of Silica Nanowires for Optical Sensing. JOURNAL OF LIGHTWAVE TECHNOLOGY, 27(24), pp. 5537–5542.
  106. Themistos, C., Rajarajan, M., Rahman, B.M.A. and Grattan, K.T.V. (2009). Characterization of silica nanowires for optical sensing. Journal of Lightwave Technology, 27(24), pp. 5537–5542. doi:10.1109/JLT.2009.2026655.
  107. Agrawal, A., Kejalakshmy, N., Rahman, B.M.A. and Grattan, K.T.V. (2009). Soft glass equiangular spiral photonic crystal fiber for supercontinuum generation. IEEE Photonics Technology Letters, 21(22), pp. 1722–1724. doi:10.1109/LPT.2009.2032523.
  108. Grattan, K.T., Rahman, B.M.A., Kejalakshmy, N., Uthman, M. and et al., (2009). Mode degeneration in bent photonic crystal fiber study by using the finite element method. APPLIED OPTICS, 48(31), pp. G131–G138.
  109. Kejalakshmy, N., Rahman, B.M.A., Agrawal, A., Tanvir, H.M. and Grattan, K.T.V. (2009). Metal-Coated Defect-Core Photonic Crystal Fiber for THz Propagation. JOURNAL OF LIGHTWAVE TECHNOLOGY, 27(11), pp. 1631–1637. doi:10.1109/JLT.2009.2020919.
  110. Tanvir, H., Rahman, B.M.A., Themistos, C., Kejalakshmy, N., Chattppaddhaye, T. and Grattan, K.T.V. (2009). Finite element characterisation of terahertz quantum cascade laser waveguides. Proceedings of SPIE - The International Society for Optical Engineering, 7215 . doi:10.1117/12.807930.
  111. Rajarajan, M., Dar, T., Themistos, C., Rahman, B.M.A., Grattan, K.T.V., Homola, J. and Irudayaraj, J. (2009). Modelling and characterisation of surface plasmon based sensors for the detection of E. coli. Journal of Modern Optics, 56(4), pp. 564–571. doi:10.1080/09500340802657870.
  112. Kejalakshmy, N., Rahman, B.M.A., Agrawal, A., Tanvir, H. and Grattan, K.T.V. (2009). Defect-core PCF with metal coated central air-hole for THz propagation. Optics InfoBase Conference Papers .
  113. Agrawal, A., Kejalakshmy, N., Chen, J., Rahman, B.M.A. and Grattan, K.T.V. (2008). Golden spiral photonic crystal fiber: polarization and dispersion properties. Opt Lett, 33(22), pp. 2716–2718.
  114. Rahman, B.A., Agrawal, A., Kejalakshmy, N., Chen, J. and et al., (2008). spiral photonic crystal fiber: polarization and dispersion properties. Optics Letters, 33, pp. 2716–2718.
  115. Kejalakshmy, N., Rahman, B.M.A., Agrawal, A., Wongcharoen, T. and Grattan, K.T.V. (2008). Characterization of single-polarization single-mode photonic crystal fiber using full-vectorial finite element method. Applied Physics B: Lasers and Optics, 93(1), pp. 223–230. doi:10.1007/s00340-008-3159-3.
  116. Rahman, B.M.A., Leung, D.M.H., Obayya, S.S.A. and Grattan, K.T.V. (2008). Bending loss, transition loss, mode coupling, and polarization coupling in bent waveguides. Proceedings of SPIE - The International Society for Optical Engineering, 6996 . doi:10.1117/12.782641.
  117. Rahman, B.M.A., Agrawal, A., Grattan, K.T.V. and Obayya, S.S.A. (2008). Rod shape optimization in photonic crystal bends by the Finite Element Method. Proceedings of SPIE - The International Society for Optical Engineering, 6989 . doi:10.1117/12.782348.
  118. Rahman, B.M.A., Leung, D.M.H., Obayya, S.S.A., Grattan, K.T. and et al., (2008). Numerical analysis of bent waveguides: bending loss, transmission loss, mode coupling, and polarization coupling. APPLIED OPTICS, 47(16), pp. 2961–2970.
  119. Kejalakshmy, N., Rahman, B.M.A., Saiful Kabir, A.K.M., Rajarajan, M. and Grattan, K.T.V. (2007). Single mode operation of photonic crystal fiber by using a fullvectorial finite element method. Proceedings of SPIE - The International Society for Optical Engineering, 6588 . doi:10.1117/12.723261.
  120. Thermistos, C., Rahman, B.M.A., Rajarajan, M., Grattan, K.T. and et al., (2007). Characterization of Silver/Polystyrene (PS)-coated hollow glass waveguides at THz frequency. JOURNAL OF LIGHTWAVE TECHNOLOGY, 25(9), pp. 2456–2462.
  121. Themistos, C., Rahman, B.M.A., Rajarajan, M., Grattan, K.T.V., Bowden, B. and Harrington, J.A. (2007). Characterization of silver/polystyrene (PS)-coated hollow glass waveguides at THz frequency. Journal of Lightwave Technology, 25(9), pp. 2456–2462. doi:10.1109/JLT.2007.902745.
  122. Pinto, D., Obayya, S.S.A., Rahman, B.M.A. and Grattan, K.T.V. (2006). FDTD analysis of nonlinear Bragg grating based optical devices. Optical and Quantum Electronics, 38(15), pp. 1217–1235. doi:10.1007/s11082-006-9020-1.
  123. Themistos, C., Rahman, B.M.A., Rajarajan, M., Rakocevic, V. and Grattan, K.T.V. (2006). Finite element solutions of surface-plasmon modes in metal-clad dielectric waveguides at THz frequency. Journal of Lightwave Technology, 24(12), pp. 5111–5118. doi:10.1109/JLT.2006.884542.
  124. Themistos, C., Rahman, B.M.A., Rajarajan, M., Kalli, K. and Grattan, K.T.V. (2006). Characterization of surface-plasmon modes in metal-clad optical waveguides. Appl Opt, 45(33), pp. 8523–8530.
  125. Rahman, B.M.A., Haxha, V., Haxha, S. and Grattan, K.T.V. (2006). Design optimization of polymer electrooptic modulators. Journal of Lightwave Technology, 24(9), pp. 3506–3515. doi:10.1109/JLT.2006.879212.
  126. Rahman, B.M.A., Kabir, A.K.M.S., Rajarajan, M., Grattan, K.T.V. and Rakocevic, V. (2006). Birefringence study of photonic crystal fibers by using the full-vectorial finite element method. Applied Physics B: Lasers and Optics, 84(1-2), pp. 75–82. doi:10.1007/s00340-006-2201-6.
  127. Haxha, S., AbdelMalek, F. and Rahman, B.M.A. (2006). Analysis of polarization conversion in AlGaAs/GaAs electrooptic polarization converter. Optics Communications, 262(1), pp. 47–56. doi:10.1016/j.optcom.2005.12.044.
  128. Finlayson, E.D., Heaton, J.M., Rahman, B.M.A. and Obayya, S.S.A. (2006). Polarization conversion in passive deep-etched GaAs/AlGaAs waveguides. JOURNAL OF LIGHTWAVE TECHNOLOGY, 24(3), pp. 1425–1432. doi:10.1109/JLT.2005.863240.
  129. Haxha, S., Ladely, E.O., AbdelMalek, F. and Azizur Rahman, B.M. (2006). Optimization of compact lateral, vertical, and combined tapered spot-size converters by use of the beam-propagation method. Applied Optics, 45(2), pp. 288–296. doi:10.1364/AO.45.000288.
  130. Obayya, S.S.A., Rahman, B.M.A. and Grattan, K.T.V. (2005). Accurate finite element modal solution of photonic crystal fibres. IEE Proceedings: Optoelectronics, 152(5), pp. 241–246. doi:10.1049/ip-opt:20045061.
  131. Rahman, B.M.A., Wongcharoen, T., Themistos, C., Abdallah, R., Kabir, A.K.M.S., Ladele, E.O., Somasiri, N., Alam, M.S., Rajarajan, M. and Grattan, K.T.V. (2005). Finite element characterisation of photonic devices for optical communications. IEE Proceedings: Circuits, Devices and Systems, 152(5), pp. 532–538. doi:10.1049/ip-cds:20045052.
  132. Rahman, B.M.A., Abdallah, R., Rajarajan, M., Obayya, S.S.A. and Grattan, K.T.V. (2005). Rigorous numerical analysis of mode beating in tapered semiconductor amplifiers. Journal of Lightwave Technology, 23(6), pp. 2124–2130. doi:10.1109/JLT.2005.849942.
  133. Rahman, B.A., Somasiri, N. and Grattan, K.T.V. (2005). Birefringence compensation of silica waveguides. IEEE Photon. Technol. Lett., 17, pp. 1205–1207.
  134. Obayya, S.S.A., Rahman, B.M.A. and Gratten, K.T.V. (2005). Full vectorial finite element modal solution of curved optical waveguides. LASER PHYSICS LETTERS, 2(3), pp. 131–136. doi:10.1002/lapl.200410161.
  135. Obayya, S.S.A., Rahman, B.M.A. and Grattan, K.T.V. (2005). Full vectorial finite element modal solution of curved optical waveguides. Laser Physics Letters, 2(3), pp. 131–136. doi:10.1002/lapl.200410161.
  136. Rahman, B.A., Obayya, S.S.A., Haxha, S. and Grattan, K.T.V. (2005). Accurate Characterization of Unexpected Polarization Conversion in Semiconductor Electrooptic Modulators. Applied Optics, 44, pp. 1032–1038.
  137. Rahman, B.M.A., Kabir, A.K.M.S., Rajarajan, M. and Grattan, K.T.V. (2005). Finite element modal solutions of planar photonic crystal fibers with rectangular air-holes. Optical and Quantum Electronics, 37(1-3), pp. 171–183. doi:10.1007/s11082-005-1134-3.
  138. Rahman, B.A., Kabir AKMS, , Rajarajan M, and et al., (2005). Finite element modal solutions of planar photonic crystal fibers with rectangular air-holes. OPTICAL AND QUANTUM ELECTRONICS, 37(1-3), pp. 171–183.
  139. Haxha, S., Rahman, B.M.A. and Langley, R.J. (2004). Broadband and low-driving-power LiNbO3 electrooptic modulators. OPTICAL AND QUANTUM ELECTRONICS, 36(14), pp. 1205–1220. doi:10.1007/s11082-004-5933-8.
  140. Rahman, B.A., Themistos, C., Rajarajan, M., Grattan, K.T.V. and Obayya, S.S.A. (2004). A rigorous comparison of the tapered and conventional MMI-based 3dB power splitters. Applied Optics, 43, pp. 5228–5235.
  141. Rahman, B.M.A., Obayya, S.S.A., Boonthitlanont, W. and Heaton, J.M. (2004). Novel Polarization-Maintaining Semiconductor Waveguide. IEEE Photonics Technology Letters, 16(3), pp. 807–809. doi:10.1109/LPT.2004.823741.
  142. Wongcharoen, T., Rahman, B.M.A. and Grattan, K.T.V. (2004). Beam forming using uniform coupled waveguide sections for efficient coupling to an optical fibre. IEE Proceedings: Optoelectronics, 151(3), pp. 151–156.
  143. Rajarajan, M., Rahman, B.M.A. and Grattan, K.T.V. (2003). A novel and compact optical polarizer incorporating a layered waveguide core structure. Journal of Lightwave Technology, 21(12), pp. 3463–3470. doi:10.1109/JLT.2003.821750.
  144. Rahman, B.M.A., Boonthittanont, W., Obayya, S.S.A., Wongcharoen, T., Ladele, E.O. and Grattan, K.T.V. (2003). Rigorous beam propagation analysis of tapered spot-size converters in deep-etched semiconductor waveguides. Journal of Lightwave Technology, 21(12), pp. 3392–3398. doi:10.1109/JLT.2003.821753.
  145. Rahman, B.A., Haxha, S., Obayya, S.S.A. and Grattan, K.T.V. (2003). Phase matching of electro-optic modulator. Applied Optics, 36, pp. 7179–7187.
  146. Rahman, B.M.A., Solaiman, T., Abdelmalek, F., Obayya, S.S.A. and Grattan, K.T.V. (2003). Polarization conversion at the discontinuities in semiconductor opto-electronic systems. Optical and Quantum Electronics, 35(14), pp. 1281–1288. doi:10.1023/B:OQEL.0000004636.60156.5c.
  147. Rajarajan, M., Rahman, B.M.A., Wongcharoen, T., Themistos, C., Somasiri, N., Haxha, S. and Grattan, K.T.V. (2003). Review of finite-element characterization of photonic devices. Journal of Modern Optics, 50(12), pp. 1835–1848. doi:10.1080/0950034031000069352.
  148. Rahman, B.A., Obayya, S.S.A., Haxha, S. and Grattan, K.T.V. (2003). Optimization of optical properties of a deeply-etched semiconductor optical modulator. IEEE J Lightwave Technol pp. 1813–1819.
  149. Wongcharoen, T., Rahman, B.M.A., Obayya, S.S.A. and Grattan, K.T.V. (2003). Rigorous modal solutions of tapered spot-size converters with diluted secondary core. Optical and Quantum Electronics, 35(8), pp. 773–781. doi:10.1023/A:1024139304282.
  150. Haxha, S., Rahman, B.M.A. and Grattan, K.T.V. (2003). Bandwidth estimation for ultra-high-speed lithium niobate modulators. Appl Opt, 42(15), pp. 2674–2682.
  151. Obayya, S.S.A., Somasiri, N., Rahman, B.M.A. and Grattan, K.T.V. (2003). Full vectorial finite element modeling of novel polarization rotators. Optical and Quantum Electronics, 35(4-5), pp. 297–312. doi:10.1023/A:1022966717562.
  152. Somasiri, N. and Rahman, B.M.A. (2003). Polarization crosstalk in high index contrast planar silica waveguides with slanted sidewalls. JOURNAL OF LIGHTWAVE TECHNOLOGY, 21(1), pp. 54–60. doi:10.1109/JLT.2002.806328.
  153. Themistos, C. and Rahman, B.M.A. (2002). Design issues of a multimode interference-based 3-dB splitter. APPLIED OPTICS, 41(33), pp. 7037–7044. doi:10.1364/AO.41.007037.
  154. Rahman, B.A., Abdelmalek, F., Obayya, S.S.A., Davies, J.B., Fernadez, F.A., Heaton, J.M. and Grattan, K.T.V. (2002). Full vectorial analysis of sharp optical waveguide corners. IEEE Photonics Technology Letters pp. 1527–1529.
  155. Rahman, B.M.A. and Haxha, S. (2002). Optimization of microwave properties for ultrahigh-speed etched and unetched lithium niobate electrooptic modulators. JOURNAL OF LIGHTWAVE TECHNOLOGY, 20(10), pp. 1856–1863. doi:10.1109/JLT.2002.803063.
  156. Rahman, B.M.A., Somasiri, N. and Windmann, M. (2002). Polarization crosstalk in high index contrast planar silica waveguides. IEEE PHOTONICS TECHNOLOGY LETTERS, 14(8), pp. 1109–1111. doi:10.1109/LPT.2002.1021985.
  157. Obayya, S.S.A., Azizur Rahman, B.M., Grattan, K.T.V. and El-Mikati, H.A. (2002). Full vectorial finite-element solution of nonlinear bistable optical waveguides. IEEE Journal of Quantum Electronics, 38(8), pp. 1120–1125. doi:10.1109/JQE.2002.800998.
  158. Obayya, S.S.A., Rahman, B.M.A., Grattan, K.T.V. and El-Mikati, H.A. (2002). Full vectorial finite-element-based imaginary distance beam propagation solution of complex modes in optical waveguides. Journal of Lightwave Technology, 20(6), pp. 1054–1060. doi:10.1109/JLT.2002.1018817.
  159. Anwar, N., Obayya, S.S.A., Haxha, S., Themistos, C., Rahman, B.M.A. and Grattan, K.T.V. (2002). The effect of fabrication parameters on a ridge Mach-Zehnder interferometric (MZI) modulator. JOURNAL OF LIGHTWAVE TECHNOLOGY, 20(5), pp. 826–833.
  160. Anwar, N., Obayya, S.S.A., Haxha, S., Themistos, C., Rahman, B.M.A. and Grattan, K.T.V. (2002). The effect of fabrication parameters on a ridge Mach-Zehnder interferometric (MZI) modulator. Journal of Lightwave Technology, 20(5), pp. 854–861. doi:10.1109/JLT.2002.1007940.
  161. Somasiri, N., Rahman, B.M.A. and Obayya, S.S.A. (2002). Fabrication tolerance study of a compact passive polarization rotator. JOURNAL OF LIGHTWAVE TECHNOLOGY, 20(4), pp. 751–757. doi:10.1109/50.996600.
  162. Obayya, S.S.A., Rahman, B.M.A., Grattan, K.T.V. and El-Mikati, H.A. (2002). Analysis of polarisation rotation in cascaded optical waveguide bends. IEE Proceedings: Optoelectronics, 149(2), pp. 75–80. doi:10.1049/ip-opt:20020347.
  163. Obayya, S.S.A., Rahman, B.M.A., Grattan, K.T.V. and El-Mikati, H.A. (2001). Improved design of a polarization converter based on semiconductor optical waveguide bends. Applied Optics, 40(30), pp. 5395–5401. doi:10.1364/AO.40.005395.
  164. Grattan, K.T., Rahman, B.M.A., Somasiri, N., Theimistos, C. and et al., (2001). Design of optical polarization splitters in a single-section deeply etched MMI waveguide. Applied Physics: B: Laser and Optics, 73(5-6), pp. 613–618.
  165. Obayya, S.S.A., Rahman, B.M.A., Grattan, K.T.V. and El-Mikati, H.A. (2001). Beam propagation modeling of polarization rotation in deeply etched semiconductor bent waveguides. IEEE Photonics Technology Letters, 13(7), pp. 681–683. doi:10.1109/68.930413.
  166. Rahman, B.A., Wongcharoen, T., Rajarajan, M. and Grattan, K.T.V. (2001). Spot-size convertion using uniform waveguide sections for efficient laser-fiber coupling, J Lightwave Technology. J Lightwave Technology, 19, pp. 708–716.
  167. Rahman, B.M.A., Obayya, S.S.A., Somasiri, N., Rajarajan, M., Grattan, K.T.V. and El-Mikathi, H.A. (2001). Design and characterization of compact single-section passive polarization rotator. Journal of Lightwave Technology, 19(4), pp. 512–519. doi:10.1109/50.920849.
  168. Rajarajan, M., Obayya, S.S.A., Rahman, B.M.A., Grattan, K.T.V. and El-Mikati, H.A. (2000). Characterisation of low-loss waveguide bends with offset-optimisation for compact photonic integrated circuits. IEE PROCEEDINGS-OPTOELECTRONICS, 147(6), pp. 382–388. doi:10.1049/ip-opt:20000814.
  169. Obayya, S.S.A., Rahman, B.M.A. and El-Mikati, H.A. (2000). Vector beam propagation analysis of polarization conversion in periodically loaded waveguides. IEEE PHOTONICS TECHNOLOGY LETTERS, 12(10), pp. 1346–1348.
  170. Rajarajan, M., Obayya, S.S.A., Rahman, B.M.A., Grattan, K.T.V. and El-Mikati, H.A. (2000). Design of compact optical bends with a trench by use of finite-element and beam-propagation methods. Applied Optics, 39(27), pp. 4946–4953. doi:10.1364/AO.39.004946.
  171. Rahman, B.M.A., Obayya, S.S.A. and El-Mikati, H.A. (2000). Minimisation of modal birefringence in semiconductor optical guided-wave devices. IEE PROCEEDINGS-OPTOELECTRONICS, 147(3), pp. 151–156. doi:10.1049/ip-opt:20000290.
  172. Obayya, S.S.A., Rahman, B.M.A. and El-Mikati, H.A. (2000). Full-vectorial finite-element beam propagation method for nonlinear directional coupler devices. IEEE JOURNAL OF QUANTUM ELECTRONICS, 36(5), pp. 556–562. doi:10.1109/3.842097.
  173. Obayya, S.S.A., Rahman, B.M.A. and El-Mikati, H.A. (2000). New full-vectorial numerically efficient propagation algorithm based on the finite element method. JOURNAL OF LIGHTWAVE TECHNOLOGY, 18(3), pp. 409–415. doi:10.1109/50.827514.
  174. Katsriku, F.A., Rahman, B.M.A. and Grattan, K.T.V. (2000). Finite-element analysis of second-harmonic generation in AlGaAs waveguides. IEEE Journal of Quantum Electronics, 36(3), pp. 282–289. doi:10.1109/3.825874.
  175. Anwar, N., Themistos, C., Azizur Rahman, B.M. and Grattan, K.T.V. (1999). Design considerations for an electrooptic directional coupler modulator. Journal of Lightwave Technology, 17(4), pp. 598–605. doi:10.1109/50.754789.
  176. Rajarajan, M., Rahman, B.M.A. and Grattan, K.T.V. (1999). A Rigorous Comparison of the Performance of Directional Couplers with Multimode Interference Devices. Journal of Lightwave Technology, 17(2), pp. 243–248. doi:10.1109/50.744233.
  177. Rahman, B.M.A., Rajarajan, M., Wongcharoen, T., Katsriku, F., Themistos, C., Buah, P.A., Meyer, M. and Grattan, K.T.V. (1999). Rigorous characterization of photonic devices using the finite element method. Proceedings of SPIE - The International Society for Optical Engineering, 3666, pp. 160–169.
  178. Rajarajan, M. and Rahman, B.M.A. (1998). Spot size expansion for improved OEIC-to-fibre coupling using directional couplers with 2D confinement. IEE Proceedings: Optoelectronics, 145(1), pp. 71–76.
  179. Themistos, C., Hadjicharalambous, A., Rahman, B.M.A., Grattan, K.T.V. and Fernandez, F.A. (1998). Gain/loss characterisation of optical waveguide and semiconductor laser structures. IEE Proceedings: Optoelectronics, 145(2), pp. 93–98.
  180. Rajarajan, M., Rahman, B.M.A. and Grattan, K.T.V. (1998). Accurate numerical analysis of multimode-interference-based 3-dB couplers. Applied Optics, 37(24), pp. 5672–5678. doi:10.1364/AO.37.005672.
  181. Rajarajan, M., Rahman, B.M.A. and Grattan, K.T.V. (1998). Numerical study of spot-size expanders for an efficient OEIC to SMF coupling. IEEE Photonics Technology Letters, 10(8), pp. 1082–1084. doi:10.1109/68.701509.
  182. Rahman, B.A., Themistos, C. and Grattan, K.T.V. (1998). Analysis of lossy TE/TM modes in metal-clad optical waveguides. Applied Optics pp. 5747–5754.
  183. Themistos, C., Rahman, B.M.A. and Grattan, K.T.V. (1998). TM/TE modal solutions for submicron lossy metal-clad optical fibres using the finite element method’. IEE P-OPTOELECTRON, 145(3), pp. 171–177.
  184. Themistos, C., Rahman, B.M.A. and Grattan, K.T.V. (1998). Accurate solutions for sub-micron metal-clad optical fibers for optical scanning microscopes. Nondestructive Testing and Evaluation, 14(3), pp. 105–114.
  185. Mahmood, N., Rahman, B.M.A. and Grattan, K.T.V. (1998). Accurate three-dimensional modal solutions for optical resonators with periodic layered structure by using the finite element method. Journal of Lightwave Technology, 16(1), pp. 156–161. doi:10.1109/50.654998.
  186. Rajarajan, M., Themistos, C., Azizur Rahman, B.M. and Grattan, K.T.V. (1997). Characterization of metal-clad TE/TM mode splitters using the finite element method. Journal of Lightwave Technology, 15(12), pp. 2264–2269. doi:10.1109/50.643553.
  187. Katsriku, F.A., Rahman, B.M.A. and Grattan, K.T.V. (1997). Numerical modeling of second harmonic generation in optical waveguides using the finite element method. IEEE Journal of Quantum Electronics, 33(10), pp. 1727–1733. doi:10.1109/3.631274.
  188. Rahman, B.A., Mahmood, N. and Grattan, K.T.V. (1997). Analysis of Bragg reflector pairs using transfer matrix, overlap and LSBR methods. Measurement Science & Technology pp. 1059–1064.
  189. Buah, P.A., Rahman, B.M.A. and Grattan, K.T.V. (1997). Numerical study of soliton switching in active three-core nonlinear fiber couplers. IEEE Journal of Quantum Electronics, 33(5), pp. 874–878. doi:10.1109/3.572163.
  190. Wongcharoen, T., Rahman, B.M.A. and Grattan, K.T.V. (1997). Electro-optic directional coupler switch characterization. Journal of Lightwave Technology, 15(2), pp. 377–382. doi:10.1109/50.554391.
  191. Ning, Y.N., Liu, Y., Grattan, K.T.V., Rahman, B.M.A. and Palmer, A.W. (1997). The limitations for suppressing modal noise induced in a graded-index multimode fibre in a white light interferometer. Optics Communications, 133(1-6), pp. 347–354.
  192. Rahman, B.M.A., Rajarajan, M., Wongcharoen, T., Buah, P.A., Grattan, K.T.V., Perrone, G. and Montrosset, I. (1996). Computer modelling of photonic devices for optical measurements. IEE Colloquium (Digest), (147) .
  193. Wongcharoen, T., Rahman, B.M.A. and Grattan, K.T.V. (1996). Accurate characterization of optical filters with two-dimensional confinement. Journal of Lightwave Technology, 14(11), pp. 2596–2603. doi:10.1109/50.548160.
  194. Rahman, B.M.A., Rajarajan, M., Wongcharoen, T. and Grattan, K.T.V. (1996). Accurate analysis of multimode interference devices. IEEE Photonics Technology Letters, 8(6), pp. 809–811. doi:10.1109/68.502102.
  195. Katsriku, F.A., Rahman, B.M.A. and Grattan, K.T.V. (1996). Finite element analysis of diffused anisotropic optical waveguides. Journal of Lightwave Technology, 14(5), pp. 780–786. doi:10.1109/50.495158.
  196. Rajarajan, M., Rahman, B.M.A., Wongcharoen, T. and Grattan, K.T.V. (1996). Accurate characterization of MMI devices with 2-dimensional confinement. IEEE/OSA J. Lightwave Technol., 14(9), pp. 2078–2084.
  197. Rahman, B.M.A., Rajarajan, M., Wongcharoen, T. and Grattan, K.T.V. (1996). Efficient fibre-laser coupling by using spot-size transformers. IEEE Photonics Technology Letters, 8(4), pp. 557–559.
  198. Rahman, B.A., Wongcharoen, T. and Grattan, K.T.V. (1996). Characterization of electro-optic directional coupler based devices. J. of Science Society of Thailand, 22, pp. 43–52.
  199. THEMISTOS, C., RAHMAN, B.M.A. and GRATTAN, K.T.V. (1995). FINITE-ELEMENT ANALYSIS OF SURFACE-PLASMON MODES FOR LOSSY OPTICAL WAVE-GUIDES BY THE USE OF PERTURBATION TECHNIQUES. APPLIED OPTICS, 34(33), pp. 7695–7701.
  200. Themistos, C., Rahman, B.M.A., Hadjicharalambous, A. and Grattan, K.T.V. (1995). Loss/gain characterization of optical waveguides. Journal of Lightwave Technology, 13(8), pp. 1760–1765. doi:10.1109/50.405321.
  201. RAHMAN, B.M.A., LEPKOWSKI, S.P. and GRATTAN, K.T.V. (1995). THERMAL MODELING OF VERTICAL-CAVITY SURFACE-EMITTING LASERS USING THE FINITE-ELEMENT METHOD. IEE PROCEEDINGS-OPTOELECTRONICS, 142(2), pp. 82–86. doi:10.1049/ip-opt:19951666.
  202. LIU, Y.E., RAHMAN, B.M.A., NING, Y.N. and GRATTAN, K.T.V. (1995). ACCURATE MODE CHARACTERIZATION OF GRADED-INDEX MULTIMODE FIBERS FOR THE APPLICATION OF MODE-NOISE ANALYSIS. APPLIED OPTICS, 34(9), pp. 1540–1543.
  203. Liu, Y., Rahman, B.M.A. and Grattan, K.T.V. (1995). Analysis of the Birefringence Properties of Optical Fibers Made by a Preform Deformation Technique. Journal of Lightwave Technology, 13(2), pp. 142–147. doi:10.1109/50.365199.
  204. Rahman, B.A., Wongcharoen, T. and Grattan, K.T.V. (1995). Finite element analysis of optical directional couplers. J. Sci. Soc. Thailand, 21, pp. 161–174.
  205. Liu, Y., Rahman, B.M.A. and Grattan, K.T.V. (1994). Thermal-stress-induced birefringence in bow-tie optical fibers. Applied Optics, 33(24), pp. 5611–5616. doi:10.1364/AO.33.005611.
  206. BUAH, P.A., RAHMAN, B.M.A. and GRATTAN, K.T.V. (1994). STUDY OF TRANSVERSE EFFECTS IN OPTICAL BISTABLE RING RESONATORS USING THE FINITE-ELEMENT METHOD. JOURNAL OF MODERN OPTICS, 41(6), pp. 1135–1139. doi:10.1080/09500349414551071.
  207. Themistos, C., Rahman, B.M.A. and Grattan, K.T.V. (1994). Finite Element Analysis for Lossy Optical Waveguides by Using Perturbation Techniques. IEEE Photonics Technology Letters, 6(4), pp. 537–539. doi:10.1109/68.281819.
  208. Rahman, B.M.A., Wongcharoen, T. and Grattan, K.T.V. (1994). Finite element analysis of nonsynchronous directional couplers. Fiber and Integrated Optics, 13(3), pp. 331–336. doi:10.1080/01468039408202241.
  209. RAHMAN, B.M.A., LIU, Y. and GRATTAN, K.T.V. (1993). FINITE-ELEMENT MODELING OF ONE-DIMENSIONAL AND 2-DIMENSIONAL MQW SEMICONDUCTOR OPTICAL WAVE-GUIDES. IEEE PHOTONICS TECHNOLOGY LETTERS, 5(8), pp. 928–931. doi:10.1109/68.238257.
  210. ETTINGER, R., FERNANDEZ, F., RAHMAN, B. and DAVIES, J. (1991). Finite element analysis of slab-loaded nonlinear waveguide with saturable media. IEEE Photonics Technology Letters, 3(2), pp. 147–149.
  211. Rahman, B.M.A., Fernandez, F.A. and Davies, J.B. (1991). Review of Finite Element Methods for Microwave and Optical Waveguides. Proceedings of the IEEE, 79(10), pp. 1442–1448. doi:10.1109/5.104219.
  212. Rahman, B.M.A., Souza, J.R. and Davies, J.B. (1990). Numerical Analysis of Nonlinear Bistable Optical Waveguides. IEEE Photonics Technology Letters, 2(4), pp. 265–267. doi:10.1109/68.53257.
  213. Rahman, B.A. and Davies, J.B. (1989). Finite element solution of nonlinear bistable waveguides. invited paper in Int. J. Opto-electronics, 4, pp. 153–161.
  214. Rahman, B.A. and Davies, J.B. (1988). Analysis of Optical Waveguides and Some Discontinuity Problems. IEE part J.(Opto-electronics) pp. 339–342.
  215. Rahman, B.A. and Davies, J.B. (1988). Analyses of Optical Waveguide Discontinuities. IEEE/OSA J. Lightwave Technology pp. 52–57.
  216. Rahman, B.A. and Davies, J.B. (1985). Vector-H Finite Element Solution of GaAs/GaAlAs Rib Waveguides. Proc. IEE, part J(Opto-electronics) pp. 349–353.
  217. Rahman, B.A. and Davies, J.B. (1984). Finite-Element Solution of Integrated Optical Waveguides. IEEE/OSA J. Lightwave Tech pp. 682–688.
  218. Rahman, B.A. and Davies, J.B. (1984). Analysis of Open Optical and Microwave Guides of Arbitrary Transverse Permittivity Pofiles. Radio Science pp. 1245–1249.
  219. Rahman, B.A. and Davies, J.B. (1984). Penalty Function Improvement of Waveguide Solutions by Finite Elements. IEEE Trans Microwave Theory Tech pp. 922–928.
  220. Rahman, B.A. and Davies, J.B. (1984). Finite-Element Analysis of Optical and Microwave Waveguide Problems. IEEE Trans. Microwave Theory Tech pp. 20–28.
  221. Rahman, B.A. and Patwari, A.M. (1979). On Computer Solution of Some Waveguide Problems. J.I.Engg.(Bangladesh), 7, pp. 9–15.

Education

EE2402 Communication Systems

2nd year module

EE3519 Wireless and Optical Communications

3rd year module

EPM911Laser and Optoelectronics

MSc module

EPM759 Signal and Information theory

MSc module

EPM756 Wireless Communications

MSc module

Other Activities

Editorial Activity

  1. Associate Editor, IEEE Photonics Journal.

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