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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| Vydáno v: | 2017 IEEE Microwaves, Radar and Remote Sensing Symposium (MRRS) s. 195 - 198 |
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| Hlavní autor: | |
| Médium: | Konferenční příspěvek |
| Jazyk: | angličtina |
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IEEE
01.08.2017
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| ISBN: | 9781509053896, 1509053891 |
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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. |
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| 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. |
| Author_xml | – sequence: 1 givenname: Tatiana L. surname: Zinenko fullname: Zinenko, Tatiana L. email: tzinenko@yahoo.com 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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