Controllable oscillated spin Hall effect of Bessel beam realized by liquid crystal Pancharatnam-Berry phase elements

Sheng Liu; Shuxia Qi; Yanke Li; Bingyan Wei; Peng Li; Jianlin Zhao

doi:10.1038/s41377-022-00888-4

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Controllable oscillated spin Hall effect of Bessel beam realized by liquid crystal Pancharatnam-Berry phase elements

Original Articles

- Controllable oscillated spin Hall effect of Bessel beam realized by liquid crystal Pancharatnam-Berry phase elements
- Light: Science & Applications Vol. 11, Issue 8, Pages: 1925-1932(2022)
- Affiliations：
  
  Key Laboratory of Light Field Manipulation and Information Acquisition, Ministry of Industry and Information Technology, and Shaanxi Key Laboratory of Optical Information Technology, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an 710129, China
- Author bio：
  
  Bingyan Wei (wbyxz@nwpu.edu.cn)
  Peng Li (pengli@nwpu.edu.cn)
  Jianlin Zhao (jlzhao@nwpu.edu.cn)
- Funds：
- DOI：10.1038/s41377-022-00888-4
  CLC：
- Published：31 August 2022，
  
  Published Online：12 July 2022，
  
  Received：01 March 2022，
  
  Revised：31 May 2022，
  
  Accepted：10 June 2022
- Accepted：
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Liu, S. et al. Controllable oscillated spin Hall effect of Bessel beam realized by liquid crystal Pancharatnam-Berry phase elements. Light: Science & Applications, 11, 1925-1932 (2022).
DOI：

Liu, S. et al. Controllable oscillated spin Hall effect of Bessel beam realized by liquid crystal Pancharatnam-Berry phase elements. Light: Science & Applications, 11, 1925-1932 (2022). DOI： 10.1038/s41377-022-00888-4.

摘要

Abstract

Pancharatnam–Berry (PB) phase has become an effective tool to realize the photonic spin Hall effect (PSHE) in recent years

due to its capacity of enhancing the spin-orbit interaction. Various forms of PSHEs have been proposed by tailoring the PB phase of light

however

the propagation trajectory control of the separated spin states has not been reported. In this paper

we realize the oscillated spin-dependent separation by using the well-designed PB phase optical elements based on the transverse-to-longitudinal mapping of Bessel beams. Two typical oscillated PSHEs

i.e.

the spin states are circulated and reversed periodically

are experimentally demonstrated with two PB phase elements fabricated with liquid crystal. The displacements and periods of these oscillations can be controlled by changing the transverse vector of the input Bessel beam. The proposed method offers a new degree of freedom to manipulate the spin-dependent separation

and provides technical supports for the application in spin photonics.

关键词

Keywords

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