Open AccessHigh efficiency active wavefront manipulation of spin photonics based on a graphene metasurface
Author(s) -
Xueyan Bai,
Linlong Tang,
Wei Yao,
Qing Zang,
Jialu Li,
Shuang Liu,
Wenqiang Lu,
Yang Liu,
Xingming Sun,
Yang Lu
Publication year - 2019
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.022475
Subject(s) - optics , circular polarization , wavefront , polarization (electrochemistry) , photonics , physics , scattering , reconfigurability , metamaterial , bandwidth (computing) , optoelectronics , computer science , telecommunications , chemistry , microstrip
Metasurfaces have been widely studied for manipulating light fields. In this work, a novel metasurface element is achieved with a high circular polarization amplitude conversion efficiency of 88.5% that creates an opposite phase shift ranging from -180° to 180° between incidence and reflection for different spin components. By arranging the elements according to different requirements, spin-dependent reflection, focusing and scattering are demonstrated. It is also demonstrated that tuning of the Fermi energy is an viable way to active control the circular polarization conversion efficiency and expand the applicable bandwidth. The results open a new route for modifying and designing the wavefront of circular polarized light.