Generation of Optical Vortices With Polarization-Insensitive Metasurfaces

IEEE Photonics Journal

Z. Shen¹  B. F. Zhang¹  J. Y. Zhou¹  Y. Z. Xue¹  R. Li¹  Z. Y. Xiang¹  Z. Y. Qiu¹ 

[1] School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing, China;

关键词: Optical vortex;    metasurfaces;    non-diffraction beam;   

DOI  :  10.1109/JPHOT.2020.3014918

来源: DOAJ

【 摘 要 】

Traditionally, optical vortices (OVs) were generated with diffractive optical elements (DOEs) such as spiral phase plate (SPP), fork grating, spatial light modulator (SLM), and liquid crystal display (LCD). Here, a method was proposed for generating OVs by employing all-dielectric polarization-insensitive metasurfaces with cylinder arrays, which have high transmission efficiency. The polarization insensitivity of the metasurfaces was illustrated with the incidence of two pairs of orthogonal polarization, both the phase and transmission efficiency were consistent for the cylinder unit cell, and similar OVs were generated with the cylinder array. The topological charges of the generated OVs can be adjusted through the design of the metasurfaces. OVs with additional characteristics as vector beams, focused beams and Bessel beams were further generated. This work has potential applications in beam shaping, optical tweezers, and optical communication.

【 授权许可】

Unknown