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Chin. Phys. B, 2019, Vol. 28(7): 076105    DOI: 10.1088/1674-1056/28/7/076105
CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES Prev   Next  

Realization of THz dualband absorber with periodic cross-shaped graphene metamaterials

Chunzhen Fan(范春珍), Yuchen Tian(田雨宸), Peiwen Ren(任佩雯), Wei Jia(贾微)
School of Physical Science and Engineering, Zhengzhou University, Zhengzhou 450001, China
Abstract  

A dualband terahertz (THz) absorber including periodically distributed cross-shaped graphene arrays and a gold layer spaced by a thin dielectric layer is investigated. Numerical results reveal that the THz absorber displays two perfect absorption peaks. To elucidate the resonant behavior, the LC model is introduced to fit the spectra. Moreover, the strength and linewidth of the absorption peak can be effectively tuned with structural parameters and the relaxation time of graphene. Owing to its rotational symmetry, this THz absorber exhibits polarization insensitivity. Our designed absorber is a promising candidate in applications of tunable optical sensors and optical filters.

Keywords:  dualband      terahertz absorber      graphene      polarization insensitivity  
Received:  24 December 2018      Revised:  20 March 2019      Accepted manuscript online: 
PACS:  61.48.Gh (Structure of graphene)  
  42.50.Gy (Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)  
  42.25.Bs (Wave propagation, transmission and absorption)  
  78.67.Pt (Multilayers; superlattices; photonic structures; metamaterials)  
Fund: 

Project supported by the Key Science and Technology Research Project of Henan Province, China (Grant Nos. 162102210164 and 1721023100107) and the Natural Science Foundation of Henan Educational Committee, China (Grant No. 17A140002).

Corresponding Authors:  Chunzhen Fan     E-mail:  chunzhen@zzu.edu.cn

Cite this article: 

Chunzhen Fan(范春珍), Yuchen Tian(田雨宸), Peiwen Ren(任佩雯), Wei Jia(贾微) Realization of THz dualband absorber with periodic cross-shaped graphene metamaterials 2019 Chin. Phys. B 28 076105

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