Ultra-Wideband Reconfigurable Terahertz Absorber Based on Graphene-VO<sub>2</sub>

LIU Guang-ru; ZHANG Yong; ZHU Hua-li; YE Long-fang; LUO Xiang; XU Rui-min; YAN Bo

doi:10.12263/DZXB.20221242

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Ultra-Wideband Reconfigurable Terahertz Absorber Based on Graphene-VO₂

THz metasuface technology and application | 更新时间：2025-12-08

- Ultra-Wideband Reconfigurable Terahertz Absorber Based on Graphene-VO₂
- ACTA ELECTRONICA SINICA Vol. 51, Issue 10, Pages: 2700-2707(2023)
- 作者机构：
  
  1.电子科技大学电子科学与工程学院，四川成都 611731
  2.厦门大学电子科学与技术学院，福建厦门 361005
- 作者简介：
- 基金信息：
  
  Science and Technology on Monolithic Integrated Circuits and Modules Laboratory(61428032204)
- DOI：10.12263/DZXB.20221242
  CLC： TN828.4;TB34
- Received：01 November 2022，
  
  Revised：2023-02-28，
  
  Published：25 October 2023
- 稿件说明：
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刘广儒,张勇,朱华利等.基于石墨烯-VO₂的可重构太赫兹超宽带吸波器[J].电子学报,2023,51(10):2700-2707.

LIU Guang-ru,ZHANG Yong,ZHU Hua-li,et al.Ultra-Wideband Reconfigurable Terahertz Absorber Based on Graphene-VO₂[J].ACTA ELECTRONICA SINICA,2023,51(10):2700-2707.
刘广儒,张勇,朱华利等.基于石墨烯-VO₂的可重构太赫兹超宽带吸波器[J].电子学报,2023,51(10):2700-2707. DOI： 10.12263/DZXB.20221242.

LIU Guang-ru,ZHANG Yong,ZHU Hua-li,et al.Ultra-Wideband Reconfigurable Terahertz Absorber Based on Graphene-VO₂[J].ACTA ELECTRONICA SINICA,2023,51(10):2700-2707. DOI： 10.12263/DZXB.20221242.

摘要

本文提出了一种基于石墨烯和二氧化钒（VO

）的伞状结构可重构太赫兹超宽带吸波器，极大地拓展了太赫兹吸波器的吸收带宽，具有功能可重构、调制深度大等优点.该吸波器由伞状VO

贴片、聚乙烯环烯烃共聚物（Topas）介电层、石墨烯层以及金属反射层组成.当VO

处于绝缘态、石墨烯的费米能级为0 eV时，该吸波器在整个太赫兹波段内表现为全反射特性.当VO

处于金属态、石墨烯的费米能级为0.75 eV时，该吸波器在3.57~10 THz频率范围内实现了超宽带吸收，平均吸收率达到了94%以上，吸收带宽高达6.43 THz.同时调节VO

的电导率和石墨烯的费米能级，可在两个完美吸收点处实现最大分别为97.9%（4.3 THz处）、96.8%（8.25 THz处）的调制深度，具有良好的开关特性.此外，该吸波器还具有极化不敏感和广角吸收特性，在

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=51179466&type=

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=51179463&type=

8.12800026

2.53999996

的入射角范围内，该吸波器在3.57~10 THz带宽范围内均保持着90%以上的吸收率.该可重构太赫兹超宽带吸波器在可调宽带吸收器件、隐身器件、热探测、太赫兹开关等领域具有潜在的应用价值.

Abstract

In this paper

a reconfigurable terahertz ultra-wideband absorber with umbrella structure based on graphene and vanadium dioxide is proposed

which greatly expands the absorption bandwidth of the terahertz absorber and has the advantages of functional reconfiguration and large modulation depth. The absorber consists of an umbrella shaped VO

patch

a polyethylene cycloolefin copolymer (Topas) dielectric layer

graphene layer

and a metallic reflector. When VO

is in the insulating state and the Fermi level of graphene is 0 eV

the absorber exhibits total reflection characteristics in the whole terahertz band. When VO

is in the metal state and the Fermi level of graphene is 0.75 eV

the absorber achieves ultra-wideband absorption in the frequency range of 3.57~10 THz

with an average absorption rate of more than 94% and an absorption bandwidth of up to 6.43 THz. By adjusting the conductivity of VO

and the Fermi level of graphene at the same time

the maximum modulation depth of 97.9% (at 4.3 THz) and 96.8% (at 8.25 THz) can be achieved at the two perfect absorption points

which has good switching characteristics. In addition

the absorber has polarization insensitivity and wide-angle absorption characteristics. In the range of 0~35°

the absorptivity of the absorber is more than 90% in the range of 3.57~10 THz bandwidth. The ultra-wideband reconfigurable terahertz absorber will have potential applications in tunable broadband absorber

stealth devices

thermal detection

terahertz switches and other fields.

关键词

Keywords

references

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⁰

Ultra-Wideband Reconfigurable Terahertz Absorber Based on Graphene-VO2

DOI：10.12263/DZXB.20221242

摘要

Abstract

关键词

Keywords

references

Ultra-Wideband Reconfigurable Terahertz Absorber Based on Graphene-VO₂