Generation of tunable superchiral spot in metal-insulator-metal waveguide  

作　　者：庄涛 胡海峰 詹其文 Tao Zhuang;Haifeng Hu;Qiwen Zhan(School of Optical-Electrical and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;Zhangjiang Laboratory,Shanghai 201204,China;Shanghai Key Laboratory of Modern Optical System,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]School of Optical-Electrical and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China [2]Zhangjiang Laboratory,Shanghai 201204,China [3]Shanghai Key Laboratory of Modern Optical System,University of Shanghai for Science and Technology,Shanghai 200093,China

出　　处：《Chinese Optics Letters》2023年第1期125-130,共6页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.62075132 and 92050202);Natural Science Foundation of Shanghai(No.22ZR1443100).

摘　　要：The chiral feature of an optical field can be evaluated by the parameter of g-factor enhancement,which is helpful to enhance chiroptic signals from a chiral dipole.In this work,the superchiral spot has been theoretically proposed in metal-insulator-metal waveguides.The g-factor enhancement of the superchiral spot can be enhanced by 67-fold more than that of circularly polarized light,and the spot is confined in the deep wavelength scale along each spatial dimension.Moreover,the position of the superchiral spot can be tuned by manipulating the incident field.The tunable superchiral spot may find applications in chiral imaging and sensing.

关 键 词：circular dichroism superchiral spot radially polarized beam metal-insulator-metal waveguide 

分 类 号：O43[机械工程—光学工程]