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      https://www.ias.ac.in/article/fulltext/boms/044/0281

    • Keywords

       

      Multiband absorber; internet of things (IoT); terahertz; graphene; tunable absorber.

    • Abstract

       

      In this paper, a novel tunable metamaterial absorber having multiple bands is presented for solving sensing-related issues in THz applications. Initially, a zigzag shaped metamaterial absorber with multiband response is reported and then, a tunable absorber is proposed to cover a wide THz spectrum. The proposed tunable absorber has six ‘V’ shaped stubs with graphene at the edges to realize six absorption bands of 0.65, 1, 1.33, 1.45, 1.74 and 1.95 THz. Thetuning of absorption bands is realized by varying the chemical potential of graphene by controlling the electrostatic gating and hence, provides tunable absorption characteristics in the optical regime. The absorber is designed with a polyimide substrate having a unit cell dimension of 0.14 ${\times}$ 0.14 ${\lambda}$o, which is smaller when compared to similar literature. The simulation result shows a better absorption rate of ${\ge}$90% over most of the operating bands. The influence of material on the absorption peak is analysed by using different types of conductors and dielectric materials.

    • Author Affiliations

       

      BALU ASHVANTH1 BACTAVATCHALAME PARTIBANE2 GOVINDANARAYANAN IDAYACHANDRAN3

      1. Department of ECE, Sri Venkateswara College of Engineering, Sriperumbudur 602117, India
      2. Department of ECE, Sri Sivasubramaniya Nadar College of Engineering, Kalavakkam 603110, India
      3. SENSE, VIT University, Chennai 632014, India
    • Dates

       
  • Bulletin of Materials Science | News

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      Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
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      Posted on July 25, 2019

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