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Terahertz quarter wave-plate metasurface polarizer based on arrays of graphene ribbons

Tavakol, M. R ; Sharif University of Technology | 2019

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  1. Type of Document: Article
  2. DOI: 10.1109/LPT.2019.2913503
  3. Publisher: Institute of Electrical and Electronics Engineers Inc , 2019
  4. Abstract:
  5. We propose a novel graphene-dielectric-based metasurface 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. © 1989-2012 IEEE
  6. Keywords:
  7. Circuit model ; Graphene ; Polarizer ; Dielectric materials ; Gold deposits ; Light polarization ; Optical devices ; Optical instruments ; Plates (structural components) ; Circuit modeling ; Control applications ; Dielectric spacers ; Dielectric substrates ; Graphene ribbons ; Metasurface ; Quarter wave-plate ; Terahertz waves
  8. Source: IEEE Photonics Technology Letters ; Volume 31, Issue 12 , 2019 , Pages 931-934 ; 10411135 (ISSN)
  9. URL: https://ieeexplore.ieee.org/document/8703726