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Optical Kossel Lines and Fluorescence in Photonic Liquid Crystals

L.D. Landau Institute for Theoretical Physics, Kosygin str. 2, 119334 Moscow, Russia
Crystals 2020, 10(6), 541; https://doi.org/10.3390/cryst10060541
Received: 24 May 2020 / Revised: 14 June 2020 / Accepted: 20 June 2020 / Published: 24 June 2020
(This article belongs to the Special Issue Localized Optical Modes in Liquid Crystals)
We propose a general analytical way to describe the fluorescence peculiarities in photonic liquid crystals (revealing themselves as an optical analog of the X-ray Kossel lines in conventional crystals) based at the localized optical edge modes existing in perfect photonic liquid crystal layers. The proposed approach allows us to predict theoretically the properties of optical Kossel lines in photonic liquid crystal (fluorescence polarization, spectral and angular fluorescence distribution, influence of the light absorption in liquid crystal, and, in particular, existing the optical Borrmann effect if the absorption in liquid crystal is locally anisotropic). Comparison of the theoretical results and the known experimental data shows that the theory reproduces sufficiently well the observation results on the fluorescence in photonic liquid crystals. For confirming a direct connection of the optical Kossel lines to the localized optical edge modes in perfect photonic liquid crystal, we propose the application of time-delayed techniques in studying the optical Kossel lines. View Full-Text
Keywords: optical Kossel lines in photonic liquid-crystal; localized conical modes in photonic liquid-crystal; two-wave dynamical diffraction theory; conical modes of high diffraction orders optical Kossel lines in photonic liquid-crystal; localized conical modes in photonic liquid-crystal; two-wave dynamical diffraction theory; conical modes of high diffraction orders
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Belyakov, V.A. Optical Kossel Lines and Fluorescence in Photonic Liquid Crystals. Crystals 2020, 10, 541.

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