Controllable optical activity with non-chiral plasmonic metasurfaces

Light, Science & Applications
Ping YuJianguo Tian

Abstract

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.

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Citations

Oct 17, 2019·Advanced Materials·Shuqi ChenJianguo Tian
Jun 6, 2018·Advanced Materials·Yogesh Kumar SrivastavaRanjan Singh
Sep 14, 2019·Optics Letters·Scott HermonXianzhong Chen
Apr 20, 2018·Advanced Materials·Wenwei LiuJianguo Tian
Jan 27, 2019·Scientific Reports·Edris AmeriSeyed Hassan Sedighy
Mar 7, 2019·Light, Science & Applications·Chaoquan HuWeitao Zheng
Jan 4, 2018·ACS Nano·Daan StellingaThomas F Krauss

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Methods Mentioned

BETA
electron-beam lithography
scanning electron microscopy

Software Mentioned

COMSOL Multiphysics

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