主题：Nonlinear Plasmonics
主讲人：Yehiam Prior
主持人：吴健 教授
时间：2017.12.5 下午2:00
地点：理科大楼A814
Prof. Prior was educated in Jerusalem, Berkeley and Harvard before joining the Weizmann Institute of Science in 1979. Since then, with the exception of sabbatical visits to Bell Communications Research Laboratories in the U.S. and the École Normale Supérieure in Paris, he has been a member of the Institute’s Department of Chemical Physics. Prof. Prior chaired the department, headed the Institute’s Division of Information Systems, chaired the Institute’s Scientific Council of all tenured professors, and until recently has served as Dean of the Faculty of Chemistry. Prof. Prior works in the fields of light matter interaction, laser spectroscopy and laser material processing. His research ranges from developing methods in nonlinear optical spectroscopy and Four Wave Mixing, to nanotechnology and surface modification on the nanoscale. In recent years, the main focus of his work is in Plasmonics and meta-surfaces, designing and fabricating intelligent nano-structures for enhanced nonlinear optical response
报告内容简介：
Metamaterials provide a platform for the study of light-matter interaction in the subwavelength regime, where the material properties can be tailored to give rise to exotic optical phenomena, such as negative refraction, electromagnetic cloaking and super-lensing. The first generation of metasurfaces relied mostly on quasi 2D structures for the control of amplitude, phase and polarization, and operated mostly in the linear regime. Subsequent developments led to refined control of the nonlinear interactions, such as harmonic generation and wave mixing, and the usefulness of such structures was demonstrated. More recently, with the advance of nanofabrication technologies, three dimensional structures started to be used as well, broadening the range of capabilities for control of the generated optical beams. In this talk I will review the current status or metamaterials for nonlinear optics, and describe our own work. We study full local phase control of the nonlinear susceptibility tensor in 3D multilayer metasurfaces and show how this control can lead to functional metamaterials operating in the nonlinear regime. The amplitude and phase control of the nonlinear signals can be achieved by tuning the resonance of the dipolar nanoantennas and the overall structure of the geometry. Carful design has led to optimal configurations for enhanced Four Wave Mixing response, and metamaterial holography. Recent development of aberration free plasmonic RGB lenses will be described.