报告题目：Manipulating Waves by Rotating Optical Axes
报告人：Dr. Jensen T H Li （香港城市大学）
时间：12月18日（周二），上午10：00
地点：物理馆512会议室

报告摘要：In this talk, we will discuss how light can be manipulated using a single type of anisotropic material by purely rotating optical axis. We construct transformation media utilizing effective media of varying optical axes. This kind of transformation media corresponds in general to an area-preserving map. We will apply such a framework to construct a wave expander and a virtual shifter as two examples to manipulate in-plane wave propagation. For out-of-plane wave propagation, we will discuss how an optical axes profile can be used to construct a meta-surface. By employing an optical axis profile through rotating the same kind of optical antennas, we can numerically demonstrate polarization-dependent bending and focusing. We will also extend our discussion to acoustic anisotropy and its usage to manipulate acoustic waves

个人简介：Dr Jensen Li received his BEng degree (First Class Honors) in electrical and electronic engineering from University of Hong Kong and his PhD degree in physics with Prof C T Chan in Hong Kong University of Science and Technology in 2004. Before joining City University of Hong Kong, he worked on metamaterials and invisibility cloak with Prof Sir John Pendry in Imperial College London, and with Prof Xiang Zhang at the University of California at Berkeley. His research interests include metamaterials/plasmonics, photonic crystals, transformation optics and artifical acoustic materials.