Switchable terahertz broadband absorption and linear-to-circular polarization conversion

被引：15

作者：

Cheng, Jie ^{[1
]}

Li, Jiusheng ^{[1
]}

机构：

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

来源：

JOURNAL OF MODERN OPTICS | 2022年 / 69卷 / 06期

基金：

中国国家自然科学基金;

关键词：

Switchable bifunctional metasurface; vanadium dioxide; broadband absorption; linear-to-circular converter; terahertz wave; polarization conversion; ELECTROMAGNETICALLY INDUCED TRANSPARENCY; HIGH-EFFICIENCY; METASURFACE; ABSORBER;

D O I：

10.1080/09500340.2022.2025937

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We proposed a switchable bifunctional metasurface for broadband absorber and linear-to-circular polarization converter (LTCPC) in terahertz regime. When vanadium dioxide (VO2) is in the metallic state, the designed metasurface acts as a broadband terahertz absorber. The results demonstrate that the absorptance is above 90% and the bandwidth ratio is 68.6% from 0.981 to 2.011 THz. When VO2 is in the insulated state, the proposed structure behaves as an LTCPC with ellipticities 1 and -1 in frequency bands of 0.391 similar to 0.517 and 0.673 similar to 2.363 THz, respectively. The axis ratio is lower than 3 dB. The designed metasurface provides a new method for designing multifunctional terahertz devices.

引用

页码：291 / 297

页数：7

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