Graphene-based tunable infrared multi band absorber

In this article, the Minkowski shaped tunable metamaterial absorber (MMA) is proposed in near-infrared wavelength and it is varied between 1200 nm and 1600 nm. The tunable absorber shows 99% of the absorption response and its bandwidth can also be varied by different chemical potential of the graphe...

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Bibliographic Details
Published in:Optics communications 2020-11, Vol.474, p.126109, Article 126109
Main Authors: Patel, Shobhit K., Sorathiya, Vishal, Sbeah, Zen, Lavadiya, Sunil, Nguyen, Truong Khang, Dhasarathan, Vigneswaran
Format: Article
Language:English
Subjects:
Graphene
Metamaterial
Perfect absorption
Tunable
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Summary:In this article, the Minkowski shaped tunable metamaterial absorber (MMA) is proposed in near-infrared wavelength and it is varied between 1200 nm and 1600 nm. The tunable absorber shows 99% of the absorption response and its bandwidth can also be varied by different chemical potential of the graphene sheet, which can be controlled by external biasing voltage. In addition, the various physical parameters of the MMA such as silica substrate height, multiple graphene silica layer, and resonator height are numerically investigated. The RLC equivalent circuit model is also observed to study the resonance behaviour over the given wavelength range. The tunable behaviour of the proposed structure paves the way for various fields of biosensor, solar absorption, and optical communication. •Metamaterial property assisted absorber is proposed using Minkowski shaped structure.•The absorber has tunable properties in 1200 nm to 1600 nm wavelength range.•The equivalent RLC circuit is also discussed for the passive component property matching.
ISSN:0030-4018
1873-0310
DOI:10.1016/j.optcom.2020.126109