• 文献标题:   A tunable hybrid graphene-metal metamaterial absorber for sensing in the THz regime
  • 文献类型:   Article
  • 作  者:   SADAFI MM, KARAMI H, HOSSEINI M
  • 作者关键词:   metamaterial, absorber, thz regime, graphene, equivalent circuit model, labelfree sensor
  • 出版物名称:   CURRENT APPLIED PHYSICS
  • ISSN:   1567-1739 EI 1878-1675
  • 通讯作者地址:  
  • 被引频次:   10
  • DOI:   10.1016/j.cap.2021.07.020 EA SEP 2021
  • 出版年:   2021

▎ 摘  要

In this paper, a graphene-based metamaterial absorber is proposed and investigated numerically, in which the interaction between a split ring resonator (SRR) and graphene results in a high-Q absorption. To make a better understanding of the resonance mechanism, the electric and the magnetic fields, and the surface currents at the resonance frequency are investigated. In order to ease the analysis of the structure, an equivalent circuit model is introduced using the transmission line theory, and the accuracy of the proposed model is verified by the full -wave simulation. Finally, different aspects of the designed metamaterial are discussed as a potential label-free sensor for chemical and biomedical sensing. It is shown that by using this structure, a sensor with a sensi-tivity of 597 GHz/RIU can be achieved.