Role of electron relaxation time in the resonance behavior of a graphene strip grating in a slab

We consider numerically the scattering and absorption of the THz-range H-polarized plane wave by an infinite grating of coplanar graphene strips placed into a dielectric slab. Our accurate treatment is based on the singular integral equation (IE) for the electric current on elementary strip and its...

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Published in:2017 IEEE Microwaves, Radar and Remote Sensing Symposium (MRRS) pp. 195 - 198
Main Author: Zinenko, Tatiana L.
Format: Conference Proceeding
Language:English
Published: IEEE 01.08.2017
Subjects:
absorption
Dielectrics
electron relaxation time
Graphene
graphene strip grating
Gratings
integral equation
plasmon and grating resonances
Scattering
Slabs
Strips
Surface impedance
transmission
ISBN:9781509053896, 1509053891
Online Access:Get full text
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Abstract We consider numerically the scattering and absorption of the THz-range H-polarized plane wave by an infinite grating of coplanar graphene strips placed into a dielectric slab. Our accurate treatment is based on the singular integral equation (IE) for the electric current on elementary strip and its projection to the set of orthogonal polynomials, which are eigenfunctions of the static part of the problem. The resulting numerical algorithm possesses guaranteed convergence and controlled accuracy of computations including the vicinities of sharp resonances. Reflectance, transmittance, and absorbance by a slab with a graphene-strip grating are studied as functions of graphene's electron relaxation time and other parameters. We show that the electron relaxation time has the strongest effect on the resonances on the surface-plasmon modes, while those on the grating modes and the slab modes remain intact.
AbstractList We consider numerically the scattering and absorption of the THz-range H-polarized plane wave by an infinite grating of coplanar graphene strips placed into a dielectric slab. Our accurate treatment is based on the singular integral equation (IE) for the electric current on elementary strip and its projection to the set of orthogonal polynomials, which are eigenfunctions of the static part of the problem. The resulting numerical algorithm possesses guaranteed convergence and controlled accuracy of computations including the vicinities of sharp resonances. Reflectance, transmittance, and absorbance by a slab with a graphene-strip grating are studied as functions of graphene's electron relaxation time and other parameters. We show that the electron relaxation time has the strongest effect on the resonances on the surface-plasmon modes, while those on the grating modes and the slab modes remain intact.
Author Zinenko, Tatiana L.
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  givenname: Tatiana L.
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  organization: Dept. of Quasi-Opt., Inst. of Radio-Phys. & Electron., Kharkiv, Kharkiv
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Snippet We consider numerically the scattering and absorption of the THz-range H-polarized plane wave by an infinite grating of coplanar graphene strips placed into a...
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StartPage 195
SubjectTerms absorption
Dielectrics
electron relaxation time
Graphene
graphene strip grating
Gratings
integral equation
plasmon and grating resonances
Scattering
Slabs
Strips
Surface impedance
transmission
Title Role of electron relaxation time in the resonance behavior of a graphene strip grating in a slab
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