Tunable spin Hall effect of light with graphene at a telecommunication wavelength

被引：59

作者：

Bai, Xiangxing ^{[1
,2
,3
,4
,5
]}

Tang, Linlong ^{[4
]}

Lu, Wenqiang ^{[4
]}

Wei, Xingzhan ^{[4
]}

Liu, Shuang ^{[4
]}

Liu, Yang ^{[1
,2
,3
,5
]}

Sun, Xiudong ^{[1
,2
,3
,5
]}

Shi, Haofei ^{[4
]}

Lu, Yueguang ^{[1
,5
]}

机构：

[1] Harbin Inst Technol, Dept Phys, Harbin 150001, Heilongjiang, Peoples R China

[2] Minist Ind & Informat Technol, Key Lab Micronano Optoelect Informat Syst, Harbin 150001, Heilongjiang, Peoples R China

[3] Harbin Inst Technol, Key Lab Microopt & Photon Technol Heilongjiang Pr, Harbin 150001, Heilongjiang, Peoples R China

[4] Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 401122, Peoples R China

[5] Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, Shanxi, Peoples R China

来源：

OPTICS LETTERS | 2017年 / 42卷 / 20期

基金：

国家高技术研究发展计划(863计划); 中国国家自然科学基金;

关键词：

METASURFACES;

D O I：

10.1364/OL.42.004087

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The spin Hall effect of light (SHEL) has been widely studied for manipulating spin-polarized photons. In this Letter, we present a mechanism to tune the spin shift of the SHEL electrically at 1550 nm by means of introducing a graphene layer. The spin shift is quite sensitive to a graphene layer near the Brewster angle for horizontal polarization incidence and can be dynamically tuned by varying the Fermi energy of graphene. We find that the position of the Brewster angle and the value of the spin shift are decided by the real and imaginary parts of graphene conductivity, respectively. In addition, two different tuned regions have been revealed: one is the "step-like switch" region where the spin shift switches between two values, and the other is the "negative modulation" region where the spin shift declines gradually as the Fermi energy increases. These findings may provide a new paradigm for a tunable spin photonic device. (C) 2017 Optical Society of America

引用

页码：4087 / 4090

页数：4

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