Graphene-metasurface for wide-incident-angle terahertz absorption

Ri-hui XIONG; Xiao-qing PENG; Jiu-sheng LI

doi:10.1631/FITEE.2000079

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Graphene-metasurface for wide-incident-angle terahertz absorption

Special Feature on Ultrafast Low-Dimensional Material Based Devices and Their Control | Updated：2022-05-19

- Graphene-metasurface for wide-incident-angle terahertz absorption
- 石墨烯超表面宽入射角太赫兹吸收
- Frontiers of Information Technology & Electronic Engineering Vol. 22, Issue 3, Pages: 334-340(2021)
- Affiliations：
  
  Center for THz Research, China Jiliang University, Hangzhou 310018, China
  State Grid Sichuan Electric Power Company, Chengdu 610041, China
- Author bio：
  
  Jiu-sheng LI, E-mail: lijsh2008@126.com
- Funds：
- DOI：10.1631/FITEE.2000079
  CLC： O436.2
- Received：06 April 2020，
  
  Revised：2020-;8-18，
  
  Published Online：11 November 2020，
  
  Published：2021-03
- Accepted：
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Ri-hui XIONG, Xiao-qing PENG, Jiu-sheng LI. Graphene-metasurface for wide-incident-angle terahertz absorption[J]. Frontiers of Information Technology & Electronic Engineering, 2021, 22(3): 334-340.
DOI：

Ri-hui XIONG, Xiao-qing PENG, Jiu-sheng LI. Graphene-metasurface for wide-incident-angle terahertz absorption[J]. Frontiers of Information Technology & Electronic Engineering, 2021, 22(3): 334-340. DOI： 10.1631/FITEE.2000079.

摘要

针对可调宽带宽入射角太赫兹波吸收器，本文提出一种石墨烯超表面结构，该结构在二氧化硅基底上沉积了按平面阵列分布的欧米伽型石墨烯图案。讨论了石墨烯费米能级层和各种基底对吸收特性的影响。在0.82–2.0 THz频率范围内，当入射角为0°–60°时，该太赫兹吸收器的吸收率超过80%。本文研究成果将惠及太赫兹波通信和生物医学成像/传感系统的应用。

Abstract

We demonstrate a graphene-metasurface structure for tunable wide-incident-angle terahertz wave absorption

which involves depositing planar arrays of Omega-shaped graphene patterns on a silicon dioxide substrate. We also discuss how the graphene Fermi-level layer and various substrates affect the absorption characteristics. The absorption of the proposed terahertz absorber is above 80% at an incident angle of 0°-60° in frequencies ranging from 0.82 to 2.0 THz. Our results will be very beneficial in the application of terahertz wave communications and biomedical imaging/sensing systems.

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