Terahertz vortex beam generator carrying orbital angular momentum in both transmission and reflection spaces

被引：13

作者：

Yang, Li-Jing ^{[1
]}

Li, Jiu-Sheng ^{[1
]}

机构：

[1] China Jiliang Univ, Ctr THz Res, Hangzhou 310018, Peoples R China

来源：

OPTICS EXPRESS | 2022年 / 30卷 / 20期

基金：

中国国家自然科学基金;

关键词：

BROAD-BAND; METASURFACE; ABSORBER; DESIGN;

D O I：

10.1364/OE.472577

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Vortex beam generators carrying orbital angular momentum (OAM) with both transmission and reflection modes has broad application prospects in full-space high data capacity communication and orbital angular momentum multiplexing systems. In this work, we proposed a vanadium dioxide (VO2) assisted metasurface to independently produce and manipulate focused vortex transmission-reflection modes with different number of beams and focal lengths under right-handed circular polarized (RCP) wave incidence. The proposed metasurface generates the diagonal vortex beams, four vortex beams, and focused vortex beam for transmission mode at 1.26THz and reflection mode at 1.06THz by changing phase state of the VO2. Our work may find many potential applications in future high data capacity information multiplexing communication systems.

引用

页码：36960 / 36972

页数：13

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