Active tunable terahertz bandwidth absorber based on single layer graphene

被引：159
作者：
Li, Wenxin [1 ]
Yi, Yingting [2 ]
Yang, Hua [3 ]
Cheng, Shubo [1 ]
Yang, Wenxing [1 ]
Zhang, Huafeng [1 ]
Yi, Zao [1 ,4 ]
Yi, Yougen [2 ]
Li, Hailiang [5 ]
机构：
[1] Yangtze Univ, Sch Phys & Optoelect Engn, Jingzhou 434023, Peoples R China
[2] Cent South Univ, Coll Phys & Elect, Changsha 410083, Peoples R China
[3] Lanzhou Univ Technol, Sch Sci, Lanzhou 730050, Peoples R China
[4] Southwest Univ Sci & Technol, Joint Lab Extreme Condit Matter Properties, Mianyang 621010, Peoples R China
[5] Chinese Acad Sci, Inst Microelect, Key Lab Microelect Devices & Integrated Technol, Beijing 100029, Peoples R China
来源：
COMMUNICATIONS IN THEORETICAL PHYSICS | 2023年 / 75卷 / 04期
基金：
中国国家自然科学基金;
关键词：
metamaterials; active tunable; bandwidth absorber; terahertz; graphene; IMPRINTED ELECTROCHEMICAL SENSOR; ABSORPTION;
D O I：
10.1088/1572-9494/acbe2d
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
In this paper, an active tunable terahertz bandwidth absorber based on single-layer graphene is proposed, which consists of a graphene layer, a photo crystal plate, and a gold substrate. When the Fermi energy (E-f) of graphene is 1.5 eV, the absorber shows high absorption in the range of 3.7 THz-8 THz, and the total absorption rate is 96.8%. By exploring the absorption mechanism of the absorber, the absorber shows excellent physical regulation. The absorber also shows good adjustability by changing the E-f of graphene. This means that the absorber exhibits excellent tunability by adjusting the physical parameters and E-f of the absorber. Meanwhile, the absorber is polarization independent and insensitive to the incident angle. The fine characteristics of the absorber mean that the absorber has superior application value in many fields such as biotechnology and space exploration.
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页数：8
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