High efficiency and high transmission asymmetric polarization converter with chiral metasurface in visible and near-infrared region  

作　　者：高雨航 田宇 杜庆国 王原丽 付琴 卞强 李政颖 冯帅 任芳芳 Yuhang Gao;Yu Tian;Qingguo Du;Yuanli Wang;Qin Fu;Qiang Bian;Zhengying Li;Shuai Feng;Fangfang Ren(School of Information Engineering,Wuhan University of Technology,Wuhan 430070,China;School of Electrical Engineering,Navy University of Engineering,Wuhan 430033,China;National Engineering Research Center of Optical Fiber Sensing Technology and Networks,Wuhan 430070,China;School of Science,Minzu University of China,Beijing 100081,China;School of Electronic Science and Engineering,Nanjing University,Nanjing 210023,China)

机构地区：[1]School of Information Engineering,Wuhan University of Technology,Wuhan 430070,China [2]School of Electrical Engineering,Navy University of Engineering,Wuhan 430033,China [3]National Engineering Research Center of Optical Fiber Sensing Technology and Networks,Wuhan 430070,China [4]School of Science,Minzu University of China,Beijing 100081,China [5]School of Electronic Science and Engineering,Nanjing University,Nanjing 210023,China

出　　处：《Chinese Physics B》2023年第7期368-374,共7页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.62075173 and 12274478);the National Key Research and Development Program of China(Grant Nos.2021YFB2800302 and 2021YFB2800604).

摘　　要：Polarization manipulation of light is of great importance because it could promote development of wireless communications,biosensing,and polarization imaging.In order to use natural light more efficiently,it is highly demanded to design and fabricate high performance asymmetric polarization converters which could covert the natural light to one particular linearly polarized light with high efficiency.Traditionally,polarizers could be achieved by controllers with crystals and polymers exhibiting birefringence.However,the polarizers are bulky in size and the theoretical conversion efficiency of the polarizers is limited to 0.5 with unpolarized light incidence.In this paper,we propose a polarization converter which could preserve high transmission for one linearly polarized light and convert the orthogonal linearly polarized light to its cross-polarized with high transmittance based on a multi-layer chiral metasurface.Theoretical results show that normally incident y-polarized light preserves high transmittance for the wavelength range from 685 nm to 800 nm while the orthogonal normally incident x-polarized light is efficiently converted to the y-polarized light with high transmittance from 725 nm to 748 nm.Accordingly,for unpolarized light incidence,transmittance larger than 0.5 has been successfully achieved in a broadband wavelength range from 712 nm to 773 nm with a maximum transmittance of 0.58 at 732 nm.

关 键 词：asymmetric polarization converter visible and near-infrared light chiral metasurface Fabry-Perot like resonance 

分 类 号：O436.3[机械工程—光学工程]