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

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 electr...

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Bibliographic Details
Main Authors: Nourinovin Shohreh, Park Sae June, Abbasi Qammer H., Alomainy Akram
Format: Article
Language:English
Published: EDP Sciences 2023-01-01
Series:EPJ Applied Metamaterials
Subjects:
Online Access:https://epjam.edp-open.org/articles/epjam/full_html/2023/01/epjam220012/epjam220012.html
Description
Summary: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.
ISSN:2272-2394