报告题目： Dynamic Wave Manipulation by Plasmonics and Metamaterials
报告人：Prof. Yongmin Liu
Department of Mechanical and Industrial Engineering，
Department of Electrical and Computer Engineering，
Northeastern University, USA
时间：2017年7月31日 (星期一)上午 10:00
地点：唐仲英楼 B501
附报告简介：
Dynamic Wave Manipulation by Plasmonics and Metamaterials
Yongmin Liu
Department of Mechanical and Industrial Engineering, Department of Electrical and Computer Engineering, Northeastern University, USA
In this talk, I will discuss our recent work in dynamic wave manipulation by plasmonics and metamaterials, which would lead to efficient, miniaturized and multifunctional devices. First, I will present a designer metasurface that can efficiently control the polarization of Smith-Purcell emission of moving charged particle by coupling the inherent electric and magnetic dipoles of the metasurface. Second, I will discuss surface plasmons in a parity-time symmetric system, which show striking features of unidirectional excitation and radiative-loss-free propagation. Finally, I will discuss origami-based, dual-band chiral at microwave frequencies. The flexibility in folding the metamaterials provides another degree of freedom for geometry control in the third dimension, which induces strong chirality from the initial, 2D achiral structure. These results open a new avenue towards lightweight reconfigurable meta-devices.
