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<p>The study focuses on a dual-functional THz graphene-based wave absorber. Two stack layers of TOPAS spacer with coated graphene patterns on top and a back reflector form the geometrical structure. The research encompasses circuit model representation and full-wave numerical modeling that converge appropriately. The work seeks to obtain different behavior versus THz radiation via external stimulation. In this way, two sets of chemical potentials can trigger the structure to show different absorption responses. So this study indicates that electrical biasing can consequently adjust the graphene conductivity and absorption response. Additionally, ample simulation results are provided to express the reliability and robustness of the proposed structure against variations in geometrical parameters, oblique radiation, electron relaxation time, and different polarizations. The results of this work suggest that a simple geometrical structure can achieve a bi-functional absorption response.</p>

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Bi-functional THz wave absorber based on periodic arrays of graphene pattern

  • 期刊论文

  • 发表日期：

    2025年8月22日

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  • Naghmeh Javadifar,
  • Seyed Saleh Ghoreishi Amiri,
  • Reza Yousefi,
  • Habib Adarang,
  • Hadi Dehbovid

摘要

The study focuses on a dual-functional THz graphene-based wave absorber. Two stack layers of TOPAS spacer with coated graphene patterns on top and a back reflector form the geometrical structure. The research encompasses circuit model representation and full-wave numerical modeling that converge appropriately. The work seeks to obtain different behavior versus THz radiation via external stimulation. In this way, two sets of chemical potentials can trigger the structure to show different absorption responses. So this study indicates that electrical biasing can consequently adjust the graphene conductivity and absorption response. Additionally, ample simulation results are provided to express the reliability and robustness of the proposed structure against variations in geometrical parameters, oblique radiation, electron relaxation time, and different polarizations. The results of this work suggest that a simple geometrical structure can achieve a bi-functional absorption response.