Photonics Research, 2020, 8 (6): 06000963, Published Online: May. 21, 2020  

Controllable photonic spin Hall effect with phase function construction Download: 603次

Author Affiliations
1 International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology, and Engineering Technology Research Center for 2D Material Information Function Devices and Systems of Guangdong Province, Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen 518060, China
2 College of New Materials and New Energies, Shenzhen Technology University, Shenzhen 518118, China
3 Guangdong Provincial Key Laboratory of Optical Information Materials and Technology & Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou 510006, China
4 Synergetic Innovation Center for Quantum Effects and Applications, School of Physics and Electronics, Hunan Normal University, Changsha 410081, China
Abstract
Photonic spin Hall effect (SHE) provides new opportunities for achieving spin-based photonics applications. However, flexibly manipulating the spin-dependent splitting (SDS) of photonic SHE and imposing extra phase modulation on the two spin components are always a challenge. Here, a controllable SHE mechanism based on phase function construction is reported. It is concluded that the phases with specific functional structures performing a coordinate translation are equivalent to integrating a gradient phase to the original phases. Hence, the original phase can be used for independent phase modulation, and the gradient phase originating from the coordinate translation is capable of manipulating the SDS. A metasurface with Pancharatnam–Berry phase that can impose conjugate phases to the two spin components of light is fabricated to verify this mechanism. By shifting the light position, the SDS is continuously manipulated in the visible region, which is successfully used for detecting the polarization ellipticity. The extra phase modulation is also performed with the original phase and thus enables measuring singular beams. It is anticipated that the controllable SHE manipulation method may open new avenues in the fields of spin photonics, optical sensing, optical communications, etc.

Yanliang He, Zhiqiang Xie, Bo Yang, Xueyu Chen, Junmin Liu, Huapeng Ye, Xinxing Zhou, Ying Li, Shuqing Chen, Dianyuan Fan. Controllable photonic spin Hall effect with phase function construction[J]. Photonics Research, 2020, 8(6): 06000963.

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