Tunable and multi-channel perfect absorber based on graphene at mid-infrared region

被引：44
|
作者：
Meng, Haiyu [1 ]
Xue, XiongXiong [1 ]
Lin, Qi [1 ]
Liu, GuiDong [1 ]
Zhai, Xiang [1 ]
Wang, LingLing [1 ]
机构：
[1] Hunan Univ, Sch Phys & Elect, Minist Educ, Key Lab Micronano Optoelectron Devices, Changsha 410082, Hunan, Peoples R China
来源：
APPLIED PHYSICS EXPRESS | 2018年 / 11卷 / 05期
基金：
中国国家自然科学基金;
关键词：
ABSORPTION; METAMATERIAL; ENHANCEMENT; EXCITATION; RESONANCE;
D O I：
10.7567/APEX.11.052002
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
A tunable, multi-channel plasmonic perfect absorber based on graphene is proposed. Simulated results reveal that the resonant wavelength can be effectively tuned in many ways (by changing the Fermi energy of graphene, radius of Si, or air gap between the Si and the graphene film). Furthermore, the multi-channel perfect absorber is obtained by changing the period of the system. Specifically, a high absorption is obtained by using a multilayer Bragg mirror in place of the metallic plate. We believe that such an absorber may have potential applications for multi-channel photodetectors, frequency selection, and electromagnetic-wave energy storage. (C) 2018 The Japan Society of Applied Physics
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页数：5
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