A new design of ultra-thin wide stop-band metamaterial filter for terahertz waves

Chao, Xiongying; Wang, Yunfan; Feng, Hao; Chen, Zhaoyang

doi:10.1007/s11082-023-05064-5

Cited by 5 publications

(1 citation statement)

References 26 publications

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“…This is because the big circle mainly affects the first absorption peak. The redshift occurs because the electric dipole resonance is a surface plasmon resonance, and the resonance frequency can be expressed as [28]:…”

Section: Analysis and Discussionmentioning

confidence: 99%

A high-quality broadband tunable terahertz metamaterial absorber based on graphene

Chao,

Xu,

Huang

et al. 2023

J. Phys. D: Appl. Phys.

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We design a graphene-based broadband tunable terahertz metamaterial absorber (MMA). Its structure consists of a surface graphene pattern layer, a medium layer and an underlying metal film. CST simulation results show that the absorption bandwidth for more than 90% absorption rate reaches 2.12 THz, and the range is 3.2-5.32 THz. The absorption bandwidth for more than 99% absorption rate reaches 1.38 THz, and the range is 3.45-4.83 THz, which was not achieved by most of the previous MMA. Multiple reflection interference theory is used to confirm the simulation results. In order to explore the physical mechanism of wideband absorption, we study the surface electric field distribution of the structure. We also find that the absorber has polarization insensitivity and wide-angle incidence characteristics. The absorption frequency of the absorber can be adjusted by changing the chemical potential of graphene. Therefore, the absorber has potential applications in terahertz absorption, filtering and sensing.

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Section: Analysis and Discussionmentioning

confidence: 99%