期刊
CARBON
卷 174, 期 -, 页码 617-624出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2020.12.001
关键词
Absorption; Graphene; Metamaterial; Vanadium dioxide
资金
- National Natural Science Foundation of China (NSFC) [11974294]
A dual-tunable metamaterial absorption modulator has been proposed based on a hybrid vanadium dioxide-graphene configuration, allowing for dynamic adjustments of absorption intensity and frequency through external stimuli. The design consists of narrowband and broadband absorbers, which are polarization-insensitive for small incident angles.
A dual-tunable metamaterial absorption modulator is proposed based on a hybrid vanadium dioxide-graphene configuration. When vanadium dioxide is in the state of metal, the design serves as a narrowband absorber. It is composed of vanadium dioxide patch, topas spacer, and vanadium dioxide film. When vanadium dioxide is in the state of dielectric, the design serves as a broadband absorber. It includes vanadium dioxide patch, topas spacer, graphene layer, vanadium dioxide film, topas spacer, metal substrate. By adjusting Fermi level of graphene from 0.1 eV to 0.7 eV, absorptance of the proposed absorber can be dynamically tuned from 45.3% to 94.5% at 0.4 THz and from 31% to 96.3% at 1.0 THz, and absorption bandwidth gradually widens. Because of the unique dielectric to metal transition properties of vanadium dioxide, the tunable behavior of absorption frequency and intensity can be achieved through external stimuli. Thus our design can realize adjustable absorption of intensity and frequency in terahertz range. Besides, the designed narrowband and broadband absorbers are polarization-insensitive for small incident angle due to the symmetry, and absorptions of the design keep good performance within the angle range of 50 degrees. (C) 2020 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据