Controllable optical activity with non-chiral plasmonic metasurfaces  

作　　者：Ping Yu Jianxiong Li Chengchun Tang Hua Cheng Zhaocheng Liu Zhancheng Li Zhe Liu Changzhi Gu Junjie Li Shuqi Chen Jianguo Tian 

机构地区：[1]The MOE Key Laboratory of Weak Light Nonlinear Photonics,School of Physics,Teda Applied Physics Institute,and the 2011 Project Collaborative Innovation Center for Biological Therapy,Nankai University,Tianjin 300071,China [2]Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China

出　　处：《Light(Science & Applications)》2016年第1期646-652,共7页光（科学与应用)（英文版）

基　　金：supported by the National Basic Research Program(973 Program)of China(2012CB921900);the Chinese National Key Basic Research Special Fund(2011CB922003);the Natural Science Foundation of China(11574163,61378006,11304163 and 91323304);the Program for New Century Excellent Talents in University(NCET-13-0294);the 111 project(B07013);the National Science Fund for Talent Training in Basic Sciences(J1103208).

摘　　要：Optical activity is the rotation of the plane of linearly polarized light along the propagation direction as the light travels through optically active materials.In existing methods,the strength of the optical activity is determined by the chirality of the materials,which is difficult to control quantitatively.Here we numerically and experimentally investigated an alternative approach to realize and control the optical activity with non-chiral plasmonic metasurfaces.Through judicious design of the structural units of the metasurfaces,the right and left circular polarization components of the linearly polarized light have different phase retardations after transmitting through the metasurfaces,leading to large optical activity.Moreover,the strength of the optical activity can be easily and accurately tuned by directly adjusting the phase difference.The proposed approach based on non-chiral plasmonic metasurfaces exhibits large optical activity with a high controllable degree of freedom,which may provide more possibilities for applications in photonics.

关 键 词：metasurfaces optical activity surface plasmon polaritons 

分 类 号：TB3[一般工业技术—材料科学与工程]