Tunable terahertz broadband absorber based on a composite structure of graphene multilayer and silicon strip array

OPTICS COMMUNICATIONS

卷:431

Article

Zhai, Zhaocheng¹  Zhang, Le^1,2  Li, Xiangjun¹  Xiao, Sanshui² 

[1] China Jiliang Univ, Ctr THz Res, Hangzhou 310018, Zhejiang, Peoples R China

[2] Tech Univ Denmark, Dept Photon Engn, DTU Foton, DK-2800 Lyngby, Denmark

关键词: Terahertz wave;    Broadband absorber;    Tunable absorber;    Multilayer graphene;   

DOI  :  10.1016/j.optcom.2018.09.017

来源: Elsevier

【 摘 要 】

We propose a terahertz broadband absorber composed by silicon strips with continuous graphene on top of a metal mirror. The simulation results show that under the combined effect of the Fabry-Perot resonance and the dipole mode oscillation excited in the silicon strip array interacting with graphene, this structure can achieve an ultra-wide absorption band from 0.73 to 1.95 THz with absorbance of 90%. By changing the size of the silicon strips or the Fermi level of graphene, the working band of the absorber can be tuned.

【 授权许可】

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