Accession Number:

AD1050984

Title:

Surface Plasmon Absorption in MoS2 and Graphene-MoS2 Micro-Gratings and the Impact of a Liquid Crystal Substrate (Postprint)

Descriptive Note:

Journal Article - Open Access

Corporate Author:

Taras Shevchenko National University of Kyiv Kyiv Ukraine

Report Date:

2018-04-27

Pagination or Media Count:

12.0

Abstract:

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.

Subject Categories:

  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE