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Open AccessArticle

Modelling the Surface Plasmon Spectra of an ITO Nanoribbon Grating Adjacent to a Liquid Crystal Layer

1
Physics Faculty, Taras Shevchenko National University of Kyiv, 01601 Kyiv, Ukraine
2
Air Force Research Laboratory, Materials and Manufacturing Directorate, Wright-Patterson Air Force Base,OH 45433, USA;
*
Author to whom correspondence should be addressed.
Materials 2020, 13(7), 1523; https://doi.org/10.3390/ma13071523 (registering DOI)
Received: 5 March 2020 / Revised: 20 March 2020 / Accepted: 23 March 2020 / Published: 26 March 2020
(This article belongs to the Special Issue Advances in Liquid Crystal Nanomaterials)
The reflection and transmission coefficients of an indium tin oxide (ITO) nanoribbon
grating placed between a nematic liquid crystal (LC) layer and an isotropic dielectric medium are
calculated in the infrared region. Reflection and transmission spectra in the range of 1–5 μm related
to the surface plasmon excitation in the ITO nanoribbons are obtained. Dependence of the peak
spectral position on the grating spacing, the ribbon aspect ratio, and the 2D electron concentration
in the nanoribbons is studied. It is shown that director reorientation in the LC layer influences the
plasmon spectra of the grating, enabling a control of both the reflection and transmission of the
system. The data obtained with our model are compared to the results obtained using COMSOL
software, giving the similar results.
Keywords: surface plasmon; plasmon spectra; nanoribbon grating; ITO; liquid crystal surface plasmon; plasmon spectra; nanoribbon grating; ITO; liquid crystal
MDPI and ACS Style

surface plasmon; plasmon spectra; nanoribbon grating; ITO; liquid crystal, I.; Zadorozhnii, V.I.; Igor P., I.P.; Bunning, T.J.; Evans, D.R. Modelling the Surface Plasmon Spectra of an ITO Nanoribbon Grating Adjacent to a Liquid Crystal Layer. Materials 2020, 13, 1523.

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