题目：Nano Photonic Architectures for Novel Communications and Sensing Technologies

报告人：Amr S. Helmy  教授

                多伦多大学电子与计算机工程系

时间：2015年10月26日上午10:00.

地点：国家脉冲强磁场科学中心B206

报告摘要：

Plasmonic waveguides provide the unique ability to confine light within a few nanometers and allow for near perfect transmission through sharp bends as well as efficient light distribution between orthogonally intersecting waveguide junctions. However, due to free-carrier absorption in the metal, the enhanced mode confinement inevitably entails an increase in the waveguide loss. This lowers the device figure-of-merit achievable with passive plasmonic components and in turn hinders the performance of active plasmonic components. In order to mitigate the losses of these waveguides; a novel methodology for designing multi-layer hybrid plasmonic waveguides has been developed. This class of modes and the design methodology associated charts a route for obtaining modes with propagation loss values in the range of 5-10 dB/mm, while maintaining mode areas that are characteristic of plasmonics. This long range mode behavior empowers a new class of optical devices such as modulators, and detectors with record device sizes and parasitic capacitance values. With these structures as a building block, new levels of optoelectronic integration and performance metrics for athermal transceivers is achievable.

报告人简介：

Amr S. Helmy is a Professor in the department of Electrical and Computer Engineering at the University of Toronto. He received both his M.Sc. (9/1995) and Ph.D. (11/1998) degrees from the University of Glasgow, Scotland, in the field of photonics. He was a European Union-sponsored research fellow on a project to study difference frequency generation in III-V heterostructures using Quantum well intermixing in 1999. Between 2000 and 2004 he joined Agilent Technologies, where he was involved in developing different photonic devices ranging from high reliability high power submarine-class 980 nm lasers, to DFBs for un-cooled high temperature operation, to integrated laser/modulator/amplifier devices. Dr. Helmy’s research interests include photonic device physics and characterization techniques, non-linear optics in III-V semiconductors, applied optical spectroscopy for III-V optoelectronic devices and materials, III-V fabrication and monolithic integration techniques.

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