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 inOptics communications Vol. 476; p. 126299
Main Authors Grebenchukov, Alexander, Masyukov, Maxim, Zaitsev, Anton, Khodzitsky, Mikhail
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.12.2020
Subjects
Coupled oscillator model
Equivalent circuit model
Fano resonance
Graphene
Terahertz
Fano resonance
Terahertz
Equivalent circuit model
Graphene
Coupled oscillator model
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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