• 文献标题:   Terahertz Quarter Wave-Plate Metasurface Polarizer Based on Arrays of Graphene Ribbons
  • 文献类型:   Article
  • 作  者:   TAVAKOL MR, RAHMANI B, KHAVASI A
  • 作者关键词:   graphene, polarizer, metasurface, circuit model
  • 出版物名称:   IEEE PHOTONICS TECHNOLOGY LETTERS
  • ISSN:   1041-1135 EI 1941-0174
  • 通讯作者地址:   Sharif Univ Technol
  • 被引频次:   7
  • DOI:   10.1109/LPT.2019.2913503
  • 出版年:   2019

▎ 摘  要

We propose a novel graphene-dielectric-based meta-surface for manipulating the polarization of the incident light in the terahertz regime. The proposed structure comprised two orthogonally oriented periodic array of graphene ribbons (PAGRs) which are separated by a dielectric spacer and deposited on an Au-backed dielectric substrate. Based on the transmission line theory, an equivalent model with excellent accuracy is suggested for the proposed structure. By leveraging the simplicity of the model, we design a three-state quarter wave plate that is able to dynamically switch the polarization of the reflected wave to linear, right-, and left-hand polarizations while keeping the reflected amplitude remarkably high. Thanks to the simplicity of the model, the proposed structure can be easily used for designing other metasurfaces for light propagation control applications in imaging, sensing, and telecommunication.