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A single gold metasurface design capable of generating vortex beams with different topological charges

XIAODONG ZHANG1,2,3,* , DEPENG KONGKONG1,2, YUAN YUAN1,2, SEN MEI1,2, LILI WANG1,2

Affiliation

  1. State Key Laboratory of Transient and Photonics , Xi’an Institute of Optics and Precision Chinese Academy of Sciences, Xi’an 710119, China
  2. University of Chinese Academy of Sciences Beijing 100049 China
  3. School of Physics and Electronic Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002 , China

Abstract

A simple approach is proposed to generate vortex beams using a metasurface composed of 31×31 array of sub-wavelength sized rectangular apertures in a ultrathin gold film. It operates at broadband (800~2000 nm) covering telecom wavelengths, topological charges of resultant vortex beams are from -4 to +4 and weight coefficient of the desired charge exceeds 0.95 under the incidence of circularly polarized light. Simulation results show that this design is logically coincidence. The designed metasurface also has advantage of favorable fabrication tolerance and may be a potential candidate in integrated optical communication system in future..

Keywords

Vortex beam, Metasurface, Space-variant polarization.

Citation

XIAODONG ZHANG, DEPENG KONGKONG, YUAN YUAN, SEN MEI, LILI WANG, A single gold metasurface design capable of generating vortex beams with different topological charges, Optoelectronics and Advanced Materials - Rapid Communications, 13, 11-12, November-December 2019, pp.580-586 (2019).

Submitted at: June 13, 2018

Accepted at: Dec. 10, 2019