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Frontiers of Information Technology & Electronic Engineering
ISSN 2095-9184 (print), ISSN 2095-9230 (online)
2021 Vol.22 No.3 P.334-340
Graphene-metasurface for wide-incident-angle terahertz absorption
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.
Key words: Graphene-metasurface, Terahertz absorber, Omega-shaped graphene patterns
1中国计量大学太赫兹研究所，中国杭州市，310018
2四川国家电网公司，中国成都市，610041
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。
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DOI:
10.1631/FITEE.2000079
CLC number:
O436.2
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On-line Access:
2021-03-08
Received:
2020-04-06
Revision Accepted:
2020-06-10
Crosschecked:
2020-08-18