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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2019-07-26
Design of a Polarization Insensitive Wideband Absorber Using Graphene Based Metasurface
By
Gopinath Samanta,

    Dr. Gopinath Samanta

    Department of Electronics and Telecommunication Engineering

    Indian Institute of Engineering Science and Technology

    India

    Homepage

Jeet Ghosh,

    Mr. Jeet Ghosh

    ECE Department

    Chaitanya Bharathi Institute of Technology

    India

    Homepage

Tarakeswar Shaw,

    Dr. Tarakeswar Shaw

    Department of Electronics & Telecommunication Engineering

    Indian Institute of Engineering Science and Technology

    India

    Homepage

Debasis Mitra

    Dr. Debasis Mitra

    Department of Electronics& Telecommunication Engineering

    Indian Institute of Engineering Science & Technology Shibpur

    India

    Homepage

Progress In Electromagnetics Research Letters, Vol. 86, 27-33, 2019
doi:10.2528/PIERL19051003 | Google Scholar

Abstract
In this paper, we demonstrate the design of a polarization-independent wideband absorber of light that consists of a perforated graphene sheet on top of a lossless dielectric spacer placed on a metallic reflector. The single layer absorber is duly designed based on impedance matching concept. The simulated results indicate that the structure produces 0.98 THz broad absorption from 1.80 THz to 2.72 THz with absorptivity larger than 90% at the normal incidence. The electromagnetic (EM) field distributions and the plots of surface power loss density have been illustrated to explain the absorption mechanism of the structure. The variation of chemical potential from 0.8 to 1.2 eV keeps 90% absorption bandwidth as much as 1 THz band. The polarization-insensitive feature and the properties under oblique incidence are also investigated. Finally, the interference theory is used to analyze and interpret the broadband absorption mechanism.
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Citation
Gopinath Samanta, Jeet Ghosh, Tarakeswar Shaw, and Debasis Mitra, "Design of a Polarization Insensitive Wideband Absorber Using Graphene Based Metasurface," Progress In Electromagnetics Research Letters, Vol. 86, 27-33, 2019.
doi:10.2528/PIERL19051003
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