Multi-parameter tunable terahertz absorber based on graphene and vanadium dioxide

被引：33

作者：

Wang, Qing Zhe ^{[1
]}

Liu, Sheng Yu ^{[2
]}

Ren, Guang Jun ^{[1
]}

Zhang, Hai Wei ^{[1
]}

Liu, Shu Chen ^{[1
]}

Yao, Jian Quan ^{[3
]}

机构：

[1] Tianjin Univ Technol, Sch Elect & Elect Engn, Tianjin Key Lab Film Elect & Commun Devices, Tianjin 300384, Peoples R China

[2] Chinese Acad Med Sci & Peking Union Med Coll, Inst Med Informat & Lib, Dept Med Data Sharing, Beijing, Peoples R China

[3] Tianjin Univ, Coll Precis Instrument & Optoelect Engn, Inst Laser & Optoelect, Minist Educ,Key Lab Optoelect Informat Sci & Tech, Tianjin 300072, Peoples R China

来源：

OPTICS COMMUNICATIONS | 2021年 / 494卷

基金：

中国国家自然科学基金;

关键词：

THz; Graphene; VO2; Metamaterial absorber; Broadband; BROAD-BAND; MULTIBAND;

D O I：

10.1016/j.optcom.2021.127050

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

This article is based on graphene and vanadium dioxide (VO2) to build a THz metamaterial absorber that can be exchanged in three modes: single-band, dual-band, and broadband. The change of the frequency band can be accomplished by changing the Fermi level of graphene and the state of VO2. When VO2 is in a metallike state, diverse single-band absorbers can be gotten, and after that, a dual-band absorber can be gotten by controlling the movement of VO2 from a metallike state to an insulation state. When VO2 is in a metallic state, the mutual coupling between graphene and VO2 expands the absorption bandwidth and realizes broadband absorption. Also, the broadband collector is not insensitive to the polarization point and occurrence point of TE polarization and TM polarization. Compared with the existing absorber, the absorber based on graphene and VO2 we outlined not only has a higher bandwidth but for most critically, can accomplish higher integration, compatibility, and a more adaptable adjustable range.

引用

页数：8

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