A Tunable Ultrabroadband Ultrathin Terahertz Absorber Using Graphene Stacks

被引：56

作者：

Dong, Yanfei ^{[1
]}

Liu, Peiguo ^{[1
]}

Yu, Dingwang ^{[1
]}

Li, Gaosheng ^{[1
]}

Yang, Liang ^{[2
]}

机构：

[1] Natl Univ Def Technol, Coll Elect Sci & Engn, Changsha 410073, Hunan, Peoples R China

[2] Sci & Technol Space Phys Lab, Beijing 100076, Peoples R China

来源：

IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS | 2017年 / 16卷

基金：

中国国家自然科学基金;

关键词：

Dynamic tuning; graphene stacks; terahertz (THz); ultrabroadband absorber; ultrathin; METAMATERIAL ABSORBER; PERFECT ABSORBER;

D O I：

10.1109/LAWP.2016.2623316

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The concept of an ultrabroadband ultrathin terahertz (THz) absorber based on graphene stacks is presented. To realize dynamic tuning of the absorption band, we combine two concentric circular split-rings encircling a split circular resonator with graphene stacks embedded in a SiO2 dielectric. The transmission line model for the proposed absorber has been theoretically investigated via the effective-medium method. The simulated results showa 0.9 absorption coefficient over the range 2.58-3.56 THz, and the central frequency of the absorption band can be tuned without absorption reduction by changing the gate voltage on the graphene stack. Furthermore, the absorption performance exhibits insensitivity to the angle of incidence. Thus, the proposed absorber is very promising for various THz applications.

引用

页码：1115 / 1118

页数：4

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