High-Efficiency Spin-Related Vortex Metalenses

Overview

Journal Nanomaterials (Basel)

Date 2021 Jul 2

PMID 34205174

Citations 4

Authors

Wei Wang

Ruikang Zhao

Shilong Chang

Jing Li

Yan Shi

Xiangmin Liu

Jinghua Sun

Qianlong Kang

Kai Guo

Zhongyi Guo

Affiliations

Soon will be listed here.

Abstract

In this paper, one spin-selected vortex metalens composed of silicon nanobricks is designed and numerically investigated at the mid-infrared band, which can produce vortex beams with different topological charges and achieve different spin lights simultaneously. Another type of spin-independent vortex metalens is also designed, which can focus the vortex beams with the same topological charge at the same position for different spin lights, respectively. Both of the two vortex metalenses can achieve high-efficiency focusing for different spin lights. In addition, the spin-to-orbital angular momentum conversion through the vortex metalens is also discussed in detail. Our work facilitates the establishment of high-efficiency spin-related integrated devices, which is significant for the development of vortex optics and spin optics.

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