Asymmetric graphene metamaterial for narrowband terahertz modulation

The properties of planar three-layer asymmetric split-ring metamaterial are studied analytically by a coupled oscillator model and equivalent circuit model. These results are verified using full-wave numerical simulations. The influence of geometrical parameters of the proposed metamaterial structur...

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Bibliographic Details
Published in:Optics communications 2020-12, Vol.476, p.126299, Article 126299
Main Authors: Grebenchukov, Alexander, Masyukov, Maxim, Zaitsev, Anton, Khodzitsky, Mikhail
Format: Article
Language:English
Subjects:
Coupled oscillator model
Equivalent circuit model
Fano resonance
Graphene
Terahertz
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Summary:The properties of planar three-layer asymmetric split-ring metamaterial are studied analytically by a coupled oscillator model and equivalent circuit model. These results are verified using full-wave numerical simulations. The influence of geometrical parameters of the proposed metamaterial structure, as well as graphene properties on the device terahertz spectral characteristics, are investigated in details. Such a comprehensive approach in graphene metamaterial description allows to design efficient narrowband modulator for a wide range of specific tasks including applications in terahertz sensing and switching. •We propose a tunable hybrid metasurface based on metal–dielectric–graphene sandwich.•Graphene conductivity changing leads to modulation of narrow Fano resonance.•Coupled oscillator and equivalent circuit models are used to analyze the metasurface.
ISSN:0030-4018
1873-0310
DOI:10.1016/j.optcom.2020.126299