12月23日 青年教师熊翔老师 午餐报告：Manipulate the Polarization State of Light with 2D and 3D Metallic Metastructures

报告时间：12月23日 中午12：15

报告地点：唐楼 B501

报告人：熊翔 博士
报告题目: Manipulate the Polarization State of Light with 2D and 3D Metallic Metastructures
报告摘要：Manipulating the polarization state, the transmission direction, the amplitude and the phase of light in a very limited space is essential for the development of photonics on-chip. Over the past decades, numerous sub-wavelength metallic microstructures have been proposed and fabricated to fulfill these demands. In this talk, we review our efforts in achieving perfect absorption, controlling the polarization state, and tuning the amplitude of light with two-dimensional (2D) and three-dimensional (3D) microstructures. With 2D and 3D asymmetric metallic metastructures, we are able to control the polarization state of light. It is demonstrated that with a stereostructured metal film, the whole metal surfaces can be used to construct either polarization-sensitive or polarization-insensitive prefect absorbers, with the advantage of efficient heat dissipation and electric conductivity. We also show that with an array of 2D and 3D microstructures, high polarization conversion ratio is achieved within a broad frequency band. In this way, all the polarization states on the Poincaré sphere can be realized without dispersion. Our practice show that metamaterials, including metasurface, indeed help to master light on nanoscale, and are promising in the development of new generation of photonics.