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Nanosystems: Physics, Chemistry, Mathematics, 2023, Volume 14, Issue 1, Pages 74–85
DOI: https://doi.org/10.17586/2220-8054-2023-14-1-74-85
(Mi nano1164)
 

PHYSICS

Electric field effect on the light penetration depth and switching times in liquid crystal cells with nonuniform director orientation

Elena V. Aksenovaa, Aleksandr A. Karetnikova, Nikita A. Karetnikovb, Aleksandr P. Kovshika, Anastasiya V. Svanidzeac, Sergey V. Ul'yanova

a Saint Petersburg State University, St. Petersburg, Russia
b ITMO University, St. Petersburg, Russia
c Ohio State University, Columbus, Ohio, USA
Abstract: The features of light refraction in liquid crystal cells with a continuously changing director distribution are studied. The theoretical description is constructed within the framework of the geometrical optics approximation. The neighborhoods of the turning points are considered, where due to the variable refractive index the ray smoothly changes the direction of propagation to the opposite one. It is shown that the applied electric field changes the nature of the extraordinary ray refraction. Electrically controlled refraction of light in cells with a planar and hybrid director orientation for incident angles exceeding the angle of total internal reflection is experimentally studied. The dependencies of the turn on and turn off times of the optical response on the applied voltage and the incident angles on the glass – liquid crystal boundary are obtained.
Keywords: refraction, liquid crystal, relaxation time, extraordinary wave, penetration depth.
Funding agency Grant number
Saint Petersburg State University IAS 11.41.1554.2017
A. V. Svanidze thanks for the support Saint Petersburg State University (Pure ID 28571656, IAS 11.41.1554.2017).
Received: 28.12.2022
Revised: 25.01.2023
Accepted: 27.01.2023
Bibliographic databases:
Document Type: Article
Language: English
Citation: Elena V. Aksenova, Aleksandr A. Karetnikov, Nikita A. Karetnikov, Aleksandr P. Kovshik, Anastasiya V. Svanidze, Sergey V. Ul'yanov, “Electric field effect on the light penetration depth and switching times in liquid crystal cells with nonuniform director orientation”, Nanosystems: Physics, Chemistry, Mathematics, 14:1 (2023), 74–85
Citation in format AMSBIB
\Bibitem{AksKarKar23}
\by Elena~V.~Aksenova, Aleksandr~A.~Karetnikov, Nikita~A.~Karetnikov, Aleksandr~P.~Kovshik, Anastasiya~V.~Svanidze, Sergey~V.~Ul'yanov
\paper Electric field effect on the light penetration depth and switching times in liquid crystal cells with nonuniform director orientation
\jour Nanosystems: Physics, Chemistry, Mathematics
\yr 2023
\vol 14
\issue 1
\pages 74--85
\mathnet{http://mi.mathnet.ru/nano1164}
\crossref{https://doi.org/10.17586/2220-8054-2023-14-1-74-85}
\elib{https://elibrary.ru/item.asp?id=50315533}
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