Angular-multiplexed multichannel optical vortex arrays generators based on geometric metasurface

Jinjin Jin; Xiong Li; Mingbo Pu; Yinghui Guo; Ping Gao; Mingfeng Xu; Zuojun Zhang; Xiangang Luo

doi:10.1016/j.isci.2021.102107

Angular-multiplexed multichannel optical vortex arrays generators based on geometric metasurface

iScience. 2021 Jan 28;24(2):102107. doi: 10.1016/j.isci.2021.102107. eCollection 2021 Feb 19.

Authors

Jinjin Jin¹, Xiong Li^{1

2}, Mingbo Pu^{1

2}, Yinghui Guo^{1

2}, Ping Gao¹, Mingfeng Xu^{1

3}, Zuojun Zhang¹, Xiangang Luo^{1

2}

Affiliations

¹ State Key Laboratory of Optical Technologies on Nano-Fabrication and Micro-Engineering, Institute of Optics and Electronics, Chinese Academy of Sciences, P.O. Box 350, Chengdu 610209, China.
² School of Optoelectronics, University of Chinese Academy of Sciences, Being 100049, China.
³ Division of Frontier Science and Technology, Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China.

Abstract

Recently, metasurface-based multichannel optical vortex arrays have attracted considerable interests due to its promising applications in high-dimensional information storage and high-secure information encryption. In addition to the well-known wavelength and polarization multiplexing technologies, the diffraction angle of light is an alternative typical physical dimension for multichannel optical vortex arrays. In this paper, based on angular multiplexing, we propose and demonstrate multichannel optical vortex arrays by using ultrathin geometric metasurface. For a circularly polarized incident light, the desired optical vortex arrays are successfully constructed in different diffraction regions. Moreover, the diffraction angle of the optical vortex array can be regulated by changing the illumination angle of incident light. Capitalizing on this advantage, the angular-multiplexed recombination of optical vortex array is further investigated. The combination of the diffraction angle of light and optical vortex array may have significant potential in applications of optical display, free-space optical communication, and optical manipulation.

Keywords: Geometrical Optics; Metamaterials; Optical Materials; Optics.