Multi-stacked polarization insensitive broadband terahertz metamaterial

In this article, we present a polarization-insensitive terahertz metamaterial designed by stacking resonators capable of providing ultra-wideband terahertz transmissions. Our design includes a square ring resonator situated between two windmill-shaped resonators, separated by a polyimide spacer. We...

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Bibliographic Details
Published in:Journal of applied physics 2024-05, Vol.135 (17)
Main Authors: Singh Chouhan, Bhagwat, Acharyya, Nityananda, Panwar, Anuraj, Roy Chowdhury, Dibakar, Kumar, Gagan
Format: Article
Language:English
Subjects:
Bandpass filters
Broadband
Metamaterials
Modulators
Multilayers
Photolithography
Polarization
Resonators
Terahertz frequencies
Transmission lines
Ultrawideband
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Summary:In this article, we present a polarization-insensitive terahertz metamaterial designed by stacking resonators capable of providing ultra-wideband terahertz transmissions. Our design includes a square ring resonator situated between two windmill-shaped resonators, separated by a polyimide spacer. We optimized the spacer thickness to achieve a broadband response in transmission. These optimized broadband metamaterial designs were fabricated through multiple steps of the photolithography process. Terahertz time-domain spectroscopy of the fabricated samples indicates broadband terahertz transmission, in agreement with both simulation findings and results calculated from the transmission line model for the multi-layered metamaterial geometry. Our research reveals a strong near-field coupling between resonators, leading to wideband transmission of terahertz waves. The stacking of these metamaterials is crucial in designing broadband bandpass filters and broadband modulators for terahertz photonics while keeping the resonance strength almost intact.
ISSN:0021-8979
1089-7550
DOI:10.1063/5.0203862