Based on graphene tunable dual-band terahertz metamaterial absorber with wide-angle

被引：172
作者：
Huang, Mulin [1 ]
Cheng, Yongzhi [1 ]
Cheng, Zhengze [2 ]
Chen, Haoran [1 ]
Mao, Xuesong [1 ]
Gong, Rongzhou [3 ]
机构：
[1] Wuhan Univ Sci & Technol, Sch Informat Sci & Engn, Wuhan 430083, Hubei, Peoples R China
[2] Hubei Univ Sci & Technol, Sch Elect & Informat Engn, Xianning 437100, Peoples R China
[3] Huazhong Univ Sci & Technol, Sch Opt & Elect Informat, Wuhan 430074, Hubei, Peoples R China
来源：
OPTICS COMMUNICATIONS | 2018年 / 415卷
基金：
中国国家自然科学基金;
关键词：
Tunable dual-band; Terahertz metamaterial absorber; Square graphene patch; ABSORPTION ENHANCEMENT; ABSORBER/REFLECTOR; MODULATION;
D O I：
10.1016/j.optcom.2018.01.051
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We present a wide-angle tunable dual-band terahertz (THz) metamaterial absorber (MMA) based on square graphene patch (SGP). This MMA is a simple periodic array, consisting of a dielectric substrate sandwiched with the SGP and a continuous metallic film. The designed MMA can achieve dual-band absorption by exciting fundamental and second higher-order resonance modes on SGP. The numerical simulations indicate that the absorption spectrum of the designed MMA is tuned from 0.85 THz to 1.01 THz, and from 2.84 THz to 3.37 THz when the chemical potential of the SGP is increasing from 0.4eV to 0.8eV. Moreover, it operates well in a wide-angle of the incident waves. The presented THz MMA based on the SGP could find some potential applications in optoelectronic related devices, such as sensor, emitter and wavelength selective radiators.
引用
收藏
页码：194 / 201
页数：8
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