An ultrathin and flexible terahertz electromagnetically induced transparency-like metasurface based on asymmetric resonators

Nourinovin, S., Park, S. J., Abbasi, Q. H. and Alomainy, A. (2023) An ultrathin and flexible terahertz electromagnetically induced transparency-like metasurface based on asymmetric resonators. EPJ Applied Metamaterials, 10, 4. (doi: 10.1051/epjam/2023001)

Abstract

Terahertz (THz) electromagnetically induced transparency-like (EIT-like) metasurfaces have been extensively explored and frequently used for sensing, switching, slow light, and enhanced nonlinear effects. Reducing radiation and non-radiation losses in EIT-like systems contributes to increased electromagnetic (EM) field confinement, higher transmission peak magnitude, and Q-factor. This can be accomplished by the use of proper dielectric properties and engineering novel designs. Therefore, we fabricated a THz EIT-like metasurface based on asymmetric metallic resonators on an ultra-thin and flexible dielectric substrate. Because the quadruple mode is stimulated in a closed loop, an anti-parallel surface current forms, producing a transparency window with a transmission peak magnitude of 0.8 at 1.96 THz. To control the growing trend of EIT-like resonance, the structure was designed with four asymmetry levels. The effect of the substrate on the resonance response was also explored, and we demonstrated experimentally how the ultra-thin substrate and the metasurface asymmetric novel pattern contributed to higher transmission and lower loss.

• Item Type: Articles
• Additional Information: This research was supported by the School of EECS at the Queen Mary University of London.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Nourinovin, Miss Shohreh and Abbasi, Professor Qammer
• Authors: Nourinovin, S., Park, S. J., Abbasi, Q. H., and Alomainy, A.
• College/School: College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
• Journal Name: EPJ Applied Metamaterials
• Publisher: EDP Sciences
• ISSN: 2272-2394
• ISSN (Online): 2272-2394
• Published Online: 08 May 2023
• Copyright Holders: Copyright © 2023 The Authors
• First Published: First published in EPJ Applied Metamaterials 10:4
• Publisher Policy: Reproduced under a Creative Commons License