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제 목 Finite Element Method and its Application for Plasmonic Devices

강 사 Prof. B M Azizur Rahman

소 속 School of Engineering and Mathematical Sciences, City University, UK

시 간 2011년 5월 23일 (월요일) 오전 10시 30분

장 소 제1 신공학관 301동 1112호

Abstract

The Photonics group at City University London (CUL) is one of the leading research groups in the world on the development of the finite element based approaches and their applications for design optimization of various photonic devices and opto-electronic integrated circuits (OEIC). Prof. Rahman was the first to develop vector-field finite element method [1] for optical waveguides and subsequently they have developed finite element based junction analysis method [2] and the beam propagation method [3], which are numerically more efficient than most of the commercial packages, which are predominantly finite difference based. The Finite Element Method uses integral formulation, can consider more efficient irregular shaped elements and can also consider slanted or curved dielectric interfaces to represent practical photonic devices more accurately. The H-field approach, developed by them is more rigorous as the H-field is continuous across the dielectric interfaces where as E-field is not continuous. Recently, they have been developing a new time-domain approach, which is expected to be computationally more efficient than the FDTD packages.

Over the last 30 years, they have not only developed these packages but also used them in the design optimization of various photonic devices. Optical waveguides with silica, silicon, polymer, lithium niobate, and compound semiconductors with linear, nonlinear, anisotropic, electro-optic, and elasto-optic materials properties with loss or gain have been characterized. Subsequently various photonic devices, such as high-speed modulators, optical filters, polarization splitters, rotators, and controllers, power splitters, compact bends, and spot-size converters have been developed. Their more recent research focus has been on the design optimization of photonic crystal fibres, photonic crystals, silicon naowires, surface plasmon modes, negative index metamaterials and THz waveguides and devices. Many of these projects have been supported by the EPSRC, EU, British Council, and industries, notably Siemens, Nortel, Corning, Bookham, US Army, Marconi, and QinetiQ.

Some selected results will be presented for plasmonic waveguides and devices for the optical and terahertz frequencies and to explore the research interests and overlaps with the CUL and SNU for possible research collaborations.

강사이력

Prof. B. M. Azizur Rahman received his PhD degree from University College London in 1982 and now a full Professor at City University London. At City University, he leads a large research group of 12 post-docs and PhD students, working on Photonics Modelling, specialised in the development and use of rigorous and full-vectorial numerical approaches to design, analyse and optimise a wide range of photonic devices. He has published more than 350 journal and conference papers, and his journal papers have been cited nearly 1800He is a senior member of IEEE (USA), member of the Optical Society of America and IEE (UK).