KMS Chongqing Institute of Green and Intelligent Technology, CAS
| Tunable spin Hall effect of light with graphene at a telecommunication wavelength | |
Bai, Xiangxing1,2,3,4,5; Tang, Linlong4 ; Lu, Wenqiang4; Wei, Xingzhan4; Liu, Shuang4; Liu, Yang1,2,3,5; Sun, Xiudong1,2,3,5; Shi, Haofei4; Lu, Yueguang1,5
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| 2017-10-15 | |
| 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 |
| DOI | 10.1364/OL.42.004087 |
| 发表期刊 | OPTICS LETTERS
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| ISSN | 0146-9592 |
| 卷号 | 42期号:20页码:4087-4090 |
| 通讯作者 | Lu, YG (reprint author), Harbin Inst Technol, Dept Phys, Harbin 150001, Heilongjiang, Peoples R China. ; Lu, YG (reprint author), Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, Shanxi, Peoples R China. |
| 收录类别 | SCI |
| WOS记录号 | WOS:000412916200013 |
| 语种 | 英语 |
