Diffraction of Electromagnetic Waves by Multilayer Graphene Metasurfaces in the Terahertz Frequency Band

We perform mathematical modeling of diffraction of plane electromagnetic waves by multilayer metasurfaces comprised by elements of graphene nanoribbons. The modeling is based on solving the three-dimensional boundary value diffraction problem by three methods, specifically, those of self-contained u...

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Bibliographic Details
Published in:Radiophysics and quantum electronics 2020-03, Vol.62 (10), p.700-712
Main Authors: Lerer, A.M., Makeeva, G. S., Golovanov, O. A.
Format: Article
Language:English
Subjects:
Analysis
Angle of reflection
Astronomy
Astrophysics and Astroparticles
Boundary conditions
Boundary value problems
Broadband
Chemical potential
Differential equations
Electric waves
Electromagnetic radiation
Electromagnetic waves
Electromagnetism
Frequencies
Graphene
Graphite
Hadrons
Heavy Ions
Incidence angle
Lasers
Mathematical and Computational Physics
Metasurfaces
Multilayers
Nuclear Physics
Observations and Techniques
Optical Devices
Optics
Photonics
Physics
Physics and Astronomy
Polaritons
Polarizers
Quantum Optics
Resonant frequencies
Substrates
Terahertz frequencies
Theoretical
Three dimensional models
Wave diffraction
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Summary:We perform mathematical modeling of diffraction of plane electromagnetic waves by multilayer metasurfaces comprised by elements of graphene nanoribbons. The modeling is based on solving the three-dimensional boundary value diffraction problem by three methods, specifically, those of self-contained units with Floquet channels, the volume integro-differential equation, and approximate boundary conditions. The coefficients of reflection, transmission, and absorption of s- and p-polarized waves by metasurfaces made of elements of rectangular graphene nanoribbons are calculated as functions of the frequency and the incidence angle for various values of the chemical potential with allowance for the geometric and dimensional effects in the terahertz frequency band. It is shown that at the resonant frequencies of the surface plasmon polariton, multilayer metasurfaces comprised by two graphene strips in an elementary cell on substrates, which contain layers of a dielectric and graphene, are electrically controlled efficient wideband terahertz absorbers and polarizers in the reflection regime that are insensitive to incidence angles.
ISSN:0033-8443
1573-9120
DOI:10.1007/s11141-020-10016-0