On-chip plasmonic spin-Hall nanograting for simultaneously detecting phase and polarization singularities

Fu Feng; Guangyuan Si; Changjun Min; Xiaocong Yuan; Michael Somekh

doi:10.1038/s41377-020-0330-z

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On-chip plasmonic spin-Hall nanograting for simultaneously detecting phase and polarization singularities

Original Articles

- On-chip plasmonic spin-Hall nanograting for simultaneously detecting phase and polarization singularities
- Light: Science & Applications Vol. 9, Issue 4, Pages: 1000-1008(2020)
- Affiliations：
  
  1.Nanophotonics Research Center, Shenzhen Key Laboratory of Micro-Scale Optical Information Technology, Shenzhen University, Shenzhen 518060, China
  2.Melbourne Centre for Nanofabrication, Victorian Node of the Australian National Fabrication Facility, Clayton, VIC, Australia
  3.Faculty of Engineering, University of Nottingham, Nottingham NG7 2RD, UK
- Author bio：
  
  Changjun Min (cjmin@szu.edu.cn)
  Xiaocong Yuan (xcyuan@szu.edu.cn)
  Michael Somekh(mike.somekh@szu.edu.cn)
- Funds：
- DOI：10.1038/s41377-020-0330-z
  CLC：
- Published：2020，
  
  Published Online：29 May 2020，
  
  Received：20 January 2020，
  
  Revised：05 May 2020，
  
  Accepted：07 May 2020
- Accepted：
Scan QR Code
Feng, F. et al. On-chip plasmonic spin-Hall nanograting for simultaneously detecting phase and polarization singularities. Light: Science & Applications, 9, 1000-1008 (2020).
DOI：

Feng, F. et al. On-chip plasmonic spin-Hall nanograting for simultaneously detecting phase and polarization singularities. Light: Science & Applications, 9, 1000-1008 (2020). DOI： 10.1038/s41377-020-0330-z.

摘要

Abstract

Phase and polarization singularities are important degrees of freedom for electromagnetic field manipulation. Detecting these singularities is essential for modern optics

but it is still a challenge

especially in integrated optical systems. In this paper

we propose an on-chip plasmonic spin-Hall nanograting structure that simultaneously detects both the polarization and phase singularities of the incident cylindrical vortex vector beam (CVVB). The nanograting is symmetry-breaking with different periods for the upper and lower parts

which enables the unidirectional excitation of the surface plasmon polariton depending on the topological charge of the incident optical vortex beam. Additionally

spin-Hall meta-slits are integrated onto the grating so that the structure has a chiral response for polarization detection. We demonstrate theoretically and experimentally that the designed structure fully discriminates both the topological charges and polarization states of the incident beam simultaneously. The proposed structure has great potential in compact integrated photonic circuits.

关键词

Keywords

references

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