Loading...
Send to Friend
 Bookmark
 Review List
  1. Designing dual-band absorbers by graphene/metallic metasurfaces

Designing dual-band absorbers by graphene/metallic metasurfaces

Barzegar Parizi, S ; Sharif University of Technology | 2019

601 Viewed
  1. Type of Document: Article
  2. DOI: 10.1109/JQE.2019.2901992
  3. Publisher: Institute of Electrical and Electronics Engineers Inc , 2019
  4. Abstract:
  5. This paper presents a novel approach for designing dual-band absorbers based on graphene and metallic metasurfaces for terahertz and mid-infrared regimes, respectively. The absorbers are composed of a 2D array of square patches deposited on a dielectric film terminated by a metal plate. Using an analytical circuit model, we obtain closed-form relations for different parameters of the structure to achieve the dual-band absorber. Two absorption bands with an obtained absorptivity of 98% at 0.53 and 1.53 THz for the graphene-based structure and 7 and 25 THz for the metallic-based case are achieved. We demonstrate that the graphene-based absorber remains as the dual band for a wide range of the Fermi level. Furthermore, the recommended dual-band absorbers are insensitive in terms of polarization and remain within various incident angles. The most important advantage of this device is its simplicity compared with the previously reported structures
  6. Keywords:
  7. Absorber ; Circuit model ; Dual band ; Mid-infrared ; Patch array ; THz frequencies ; Circuit simulation ; Dielectric films ; Infrared devices ; Plate metal ; Circuit modeling ; Midinfrared ; Patch arrays ; THz frequencies ; Graphene
  8. Source: IEEE Journal of Quantum Electronics ; Volume 55, Issue 2 , 2019 ; 00189197 (ISSN)
  9. URL: https://ieeexplore.ieee.org/document/8653895