Paper
18 December 2023 Research on vortex lens based on full dielectric cross-shaped antenna
Shuyuan Lv, Yating Dang, Wenfeng Luo, Haifeng Xu
Author Affiliations +
Abstract
In this paper, the metasurface is designed based on silicon nitride material that can generate vortex beams at 830nm, and its corresponding performance is also studied. Firstly, the vortex metasurface based on cross-shaped nanopillars is designed with propagation phase. By changing the topological charge and focal length, two types of vortex metasurfacesare designed to produce vortex beams at the same focal length with different topological charges and at the different focal lengths with the same topological charge. Secondly, a double-layer metasurface is further designed with propagation phase for the lower layer and Pancharatnam–Berry phase for the upper layer. Spin-related vortex beams with different focal lengths and topological charges can be generated when left-handed circularly polarized light (LCP) or right-handed circularly polarized light (RCP) is incident on this double-layer metasurface, respectively. This study provides some ideas for the design of vortex metasurfaces in the near infrared.
(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.
Shuyuan Lv, Yating Dang, Wenfeng Luo, and Haifeng Xu "Research on vortex lens based on full dielectric cross-shaped antenna", Proc. SPIE 12959, AOPC 2023: Laser Technology and Applications; and Optoelectronic Devices and Integration, 129590Y (18 December 2023); https://doi.org/10.1117/12.3007769
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KEYWORDS
Spiral phase plates

Polarized light

Electric fields

Phase shift keying

Antennas

Dielectrics

Design and modelling

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