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Photonics 2018, 5(4), 30; https://doi.org/10.3390/photonics5040030

Coupled Chiral Optical Tamm States in Cholesteric Liquid Crystals

1
Siberian Federal University, Institute of Engineering Physics and Radio Electronics, 660041 Krasnoyarsk, Russia
2
Kirensky Institute of Physics, Federal Research Center “Krasnoyarsk Scientific Center, Russian Academy of Sciences, Siberian Branch”, 660036 Krasnoyarsk, Russia
*
Author to whom correspondence should be addressed.
Received: 29 August 2018 / Revised: 21 September 2018 / Accepted: 26 September 2018 / Published: 28 September 2018
(This article belongs to the Special Issue Nonlinear Dielectric Photonics and Metasurfaces)
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Abstract

The modes formed by two coupled chiral optical Tamm states localized at the interfaces between a photonic cholesteric liquid crystal conjugated with polarization-preserving anisotropic mirrors have been analytically and numerically investigated. These modes are only excited at the diffracting polarization of incident light. As the cholesteric layer thickness decreases, the spectral splitting of the localized state frequency is predicted. The splitting value depends on the crystal layer thickness. At the nondiffracting circular polarization, the localized modes are not excited, and the system becomes similar to the Fabry–Pérot cavity containing an anisotropic helical structure. View Full-Text
Keywords: cholesteric liquid crystal; optical Tamm states; localization; transmission spectrum; optical devices cholesteric liquid crystal; optical Tamm states; localization; transmission spectrum; optical devices
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Pyatnov, M.V.; Timofeev, I.V.; Vetrov, S.Y.; Rudakova, N.V. Coupled Chiral Optical Tamm States in Cholesteric Liquid Crystals. Photonics 2018, 5, 30.

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