物理系学术讲座：Metasurfaces for engineering complex structured beams
主讲人：陈献忠 （Heriot-Watt University）
主讲人简介：Xianzhong Chen is an Associate Professor in the Institute of Photonics and Quantum Sciences at Heriot-Watt University, UK. His Experimental Nanophotonics Group is dedicated to the fundamental physics of optical metasurfaces and ultrathin optical devices for imaging, defence, display and information processing. His current research interests include metalenses, holograms, optical vortex beams and polarization detection. He has built connection with local industry, including STMicroelectronics, Renishaw and Ceres Holographics. He has published over 90 papers, including Nature Communications, Science Advances, Advanced Materials, Nano Letters, and Light: Science & Applications. He also serves as an Associate Editor of Frontiers in Nanotechnology.
主讲内容简介：3D polarization structures and grafted vortex beams are complex structured optical beams, which have unique optical features and offer more degrees of freedom for carrying information. Driven by device miniaturization and system integration, there is a huge interest in developing compact and lightweight planar optical devices with novel functionalities that cannot be obtained with conventional optical elements. In this talk, I am going to share our recent work on optical metasurfaces for creating and manipulating 3D polarization structures and grafted vortex beams with. We experimentally demonstrated various 3D polarization structures and grafted vortex beams with a single metasurface. Our research findings may be of interest to many practical applications such as quantum science, vector beam generation, virtual reality, image steganography, and security.