Speaker: Dr. Lin Li (Northeastern )

Time and Date: 10:00-11:00 am, January 5, 2018

Place: Room 206 of Genetics Building, Handan Campus, Fudan University

Abstract:

Optical metasurfaces are ultra-thin artificial structures consisting of rationally designed, subwavelength building blocks, which provide us with unique capabilities to fully control light with two-dimensional platforms and thus realize “planar photonics”. In this talk, I will introduce my research on light manipulation with metasurfaces, including the source, modulation and detection of light, which will benefit the development of compact integrated photonic devices. First, I will present the manipulation of surface plasmon polaritons (SPPs) propagation on a patterned planar metal surface. Second, I will discuss a metasurface that can efficiently control the polarization and spatial distribution of Smith-Purcell emission from moving charged particles. The coupling between electrons and a metasurface offers new opportunities for both light sources and particle detectors. Finally, I will introduce a design of a sub-micron pixelated dielectric metasurface for color detector, which is based on the resonant absorption of silicon nano-structures. With an isotropic scheme under the theory of anti-Hermitian, we realize a polarization-independent color sorting metasurface with no detrimental cross talk.

Biography:

李林博士是美国东北大学机械工程系的博士后。在此之前，他曾在加州大学伯克利分校纳米科学与工程中心和机械工程系从事博士后研究。李林博士分别于2005年和2014年获得学士学位和博士学位。他的研究主要集中于纳米光子学，研究微纳结构对于光场的操控以及相关的应用。李林博士以第一作者发表Phys. Rev. Lett.，Nano Letters，Light:Science&Applications等多篇高水平论文，并获得“王大珩光学奖”，“Springer Theses Award”等奖励。