报告题目：EMERGENCE OF PHOTONICS AND RIGOROUS DESIGN OPTIMIZATION OF PHOTONIC DEVICES

时间: 2018年04月02日（周一） 9:30-11:00 am

地点: 电子与光学工程学院学科楼A-327

报告人:Prof. B M Azizur Rahman,City, University of London

主办单位：电子与光学工程学院、微电子学院

报告人简介:

Prof. B. M. Azizur Rahman received his PhD degree in Electronics from University College London. In 1988, he joined City University, London, as a lecturer, where became a full Professor in 2000. At City University, he leads the research group 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, such as spot-size converters, high-speed optical modulators, compact bend designs, power splitters, polarisation splitters, polarisation rotators, polarization controllers, SBS, terahertz devices, etc. He has published more than 550 journal and conference papers, and his journal papers have been cited more than 4500 times. He has supervised 29 students to complete their PhD degrees as their first supervisor and received more than £11 M in research grants. Prof. Rahman is Fellow of the IEEE, Optical Society of America (OSA) and the SPIE.

报告摘要:

With the advent of semiconductor lasers and low-loss optical fibres in mid 60s, the progress of optical technology has been significant in the field of optical communications. Recently, the novel photonic crystal fibre (PCF), showing great promise any may revolutionize the way we would transmits optical signals in the future. Spot-size converters, may alleviate the problem of coupling active devices with fibres, and accelerate the introduction of wide-band fibre-to-the-home. High-speed modulators have increased the data rate beyond 40 Gb/s, WDM technology allows dense multiplexing of many signal channels and optical amplifier to increase the span lengths.

The optimization of such advanced devices requires an accurate knowledge of their lightwave propagation characteristics and their dependence on the system fabrication parameters. Of the different numerical approaches for modal solutions reported so far, the finite element method (FEM) has been established as one of the most powerful methods. To design and analyse such photonic devices, it is important to use a junction analysis program in association with a modal analysis program. The least squares boundary residual (LSBR) method has been developed by the speaker. Such an approach is particularly useful in the characterization of tapered sections. More recently, FE-based time domain approach is being developed to study devices with strong reflections.

Numerically simulated results for many important guided-wave photonic devices, using the full vectorial finite element-based approaches, would be presented, such as photonic crystal fibres, photonic crystals, THz waveguides, high-speed modulators, spot-size converters, silicon photonics, optical polarizers and polarization rotators.