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Terahertz metamaterial absorber design and parametric analysis for Quad/-Penta and Hexa band applications

AMIT KUMAR VARSHNEY1,* , N. SARAVANAKUMAR2, P. SRIDHAR3

Affiliation

  1. Dept. of ECE, Saveetha Engineering College, Chennai, Tamil Nadu, India
  2. Department of ECE, Dr. Mahalingam College of Engineering & Technology, Pollachi, Tamil Nadu, India
  3. Department of ECE, Sri Ramakrishna Engineering College, Coimbatore, Tamilnadu, India

Abstract

In this paper, a polarization- and angle-insensitive terahertz (THz) metamaterial absorber (MMA) is designed and simulated for quad-, penta-, and hexa-band applications. Without using multiple layers or multiple resonators in a single unit cell, the proposed absorber contains only three layers. A dielectric substrate is placed in between the ground-plane and top patch resonator. The top simple patch planar structure consists of a square and an eclipse-shaped structure. From the parametric study, three designs are developed for quad-, penta-, and hexa-band operation with the maximum absorption rate. To analyze the physical structure of the MMA, parameter values with resonant frequency, electric field, magnetic field, and surface current distribution are simulated, and the results are presented. The polarization and angle-insensitive characteristics of the MMA are explained by varying the angle values from zero degrees to ninety degrees. Within the small frequency range (0.1–0.35) THz, the quad-, penta-, and hexa-bands are achieved without overlapping. This structure will be used for sensing, polarization imaging, and multiband applications..

Keywords

Quad-/Penta and Hexa band, Polarization and incident angle insensitive, Parametric study.

Submitted at: May 15, 2023
Accepted at: Nov. 24, 2023

Citation

AMIT KUMAR VARSHNEY, N. SARAVANAKUMAR, P. SRIDHAR, Terahertz metamaterial absorber design and parametric analysis for Quad/-Penta and Hexa band applications, Journal of Optoelectronics and Advanced Materials Vol. 25, Iss. 11-12, pp. 534-542 (2023)