Surface plasmon absorption in MoS2 and graphene-MoS2 micro-gratings and the impact of a liquid crystal substrate | Zendy

Victor Reshetnyak | Zendy; V. I. Zadorozhnii | Zendy; I. P. Pinkevych | Zendy; Timothy J. Bunning | Zendy; D. R. Evans | Zendy

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Surface plasmon absorption in MoS2 and graphene-MoS2 micro-gratings and the impact of a liquid crystal substrate

Author(s) -

Victor Reshetnyak,

V. I. Zadorozhnii,

I. P. Pinkevych,

Timothy J. Bunning,

D. R. Evans

Publication year - 2018

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.5032297

Subject(s) - materials science , grating , plasmon , graphene , absorption (acoustics) , surface plasmon , optics , optoelectronics , ribbon , substrate (aquarium) , nanotechnology , composite material , oceanography , physics , geology

The absorption coefficients of a far-infrared wave are calculated at normal incidence for MoS2 and graphene-MoS2 micro-ribbon gratings placed between a nematic LC and an isotropic dielectric medium. Maxima in the absorption spectra, which are related to the excitation of the surface plasmons in micro-ribbons of these gratings, are observed. The spectral position of absorption maxima depends on the grating spacing, micro-ribbon width, and conductivity of the ribbons. The impact of the 2D electron concentration of the MoS2 ribbons on the plasmon bands is different for a MoS2-grating versus a graphene-MoS2 grating. The influence of the LC orientational state on the absorption spectra of the gratings enables the manipulation of the absorption peak magnitude.

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