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Design of a five-band polarization-insensitive terahertz metamaterial absorber

A. ELAKKIYA1,* , S. RADHA1, E. MANIKANDAN2, B. S. SREEJA1

Affiliation

  1. SSN College of Engineering, Chennai – 603110, India
  2. Department of ECE, B. S. Abdur Rahman Crescent Institute of Science and Technology, Chennai-600048, India

Abstract

A novel five band polarization independent terahertz metamaterial absorber is proposed. Three small equilateral triangle-shapes are etched from a star-shaped metallic structure in which the pattern was placed on the top of the absorber structure and the metallic ground plane was separated from the polyimide dielectric substrate. The proposed absorber was a resonance at five different frequencies for the absorptivity of 98.7% at 0.3288 THz, 96% at 0.4068 THz, 97% at 0.4228 THz, 99% at 0.4472 THz, and 92% at 0.462 THz. The physical properties of the structure were analyzed by an electric field, magnetic field and surface current distribution mechanisms. This can be used the material sensing, optoelectronics, terahertz imaging..

Keywords

Polyimide, Terahertz, Metamaterial, Five-bands.

Submitted at: Nov. 19, 2018
Accepted at: Aug. 20, 2019

Citation

A. ELAKKIYA, S. RADHA, E. MANIKANDAN, B. S. SREEJA, Design of a five-band polarization-insensitive terahertz metamaterial absorber, Journal of Optoelectronics and Advanced Materials Vol. 21, Iss. 7-8, pp. 450-454 (2019)