• 文献标题:   Ultra-broadband tunable terahertz absorber based on graphene metasurface with multi-square rings
  • 文献类型:   Article
  • 作  者:   DING ZP, SU W, WU H, LI WL, ZHOU YH, YE LP, YAO HB
  • 作者关键词:   terahertz absorber, graphene, metasurface, absorption tunable
  • 出版物名称:   MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
  • ISSN:   1369-8001 EI 1873-4081
  • 通讯作者地址:  
  • 被引频次:   0
  • DOI:   10.1016/j.mssp.2023.107557 EA APR 2023
  • 出版年:   2023

▎ 摘  要

In recent years, thinness, lightness, broadband, high absorption, and tunability have become five important elements for electromagnetic (EM) absorbers. This article proposes a novel single-layered graphene metasurface absorber (GMSA) that perfectly achieves all of the above elements. The GMSA differs from common hybrid patterns in that it adopts a graphene layer with a simple multi-square ring structure. The simulation results show that Fabry-Perot resonance (FPR) and graphene-based surface plasmon resonance (GSPR) can be combined to produce the broadband absorption of 3.04 THz in the terahertz (THz) frequency range. The proposed GMSA is completely polarization-insensitive because of its symmetrical configuration, and it exhibits wide-angle oblique incidence properties for both TE and TM-polarized waves, allowing it to achieve broadband absorption with at least 90% absorption in the range of incident angles from 0 degrees to 45 degrees. In addition, the chemical potential of graphene can be altered to change the effective absorption bandwidth, which can be easily tuned by the applied external voltage. The GMSA has broad application prospects in THz detection, imaging, and object cloaking due to its flexible and straightforward construction, polarization insensitive, wide-angle incident, broadband, and high absorption qualities.