Localized modes in optics of photonic liquid crystals with local anisotropy of absorption

The localized optical modes in spiral photonic liquid crystals are theoretically studied for the certainty at the example of chiral liquid crystals (CLCs) for the case of CLC with an anisotropic local absorption. The model adopted here (absence of dielectric interfaces in the structures under invest...

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Bibliographic Details
Published in:Journal of experimental and theoretical physics 2016-05, Vol.122 (5), p.932-941
Main Authors: Belyakov, V. A., Semenov, S. V.
Format: Article
Language:English
Subjects:
ABSORPTION
Analysis
ANISOTROPY
CHIRALITY
Classical and Quantum Gravitation
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
DEFECTS
DIELECTRIC MATERIALS
DISPERSIONS
Elementary Particles
EQUATIONS
INTERFACES
LANTHANUM SELENIDES
LAYERS
LIFETIME
LIQUID CRYSTALS
MIXING
Nonlinear
OPTICAL MODES
ORDER PARAMETERS
Particle and Nuclear Physics
Physics
Physics and Astronomy
POLARIZATION
Quantum Field Theory
REFLECTION
Relativity Theory
SIMULATION
Soft Matter Physics
Solid State Physics
Statistical
SURFACES
VISIBLE RADIATION
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Summary:The localized optical modes in spiral photonic liquid crystals are theoretically studied for the certainty at the example of chiral liquid crystals (CLCs) for the case of CLC with an anisotropic local absorption. The model adopted here (absence of dielectric interfaces in the structures under investigation) makes it possible to get rid of mixing of polarizations on the surfaces of the CLC layer and of the defect structure and to reduce the corresponding equations to only the equations for light with polarization diffracting in the CLC. The dispersion equations determining connection of the edge mode (EM) and defect mode (DM) frequencies with the CLC layer parameters (anisotropy of local absorption, CLC order parameter) and other parameters of the DMS are obtained. Analytic expressions for the transmission and reflection coefficients of CLC layer and DMS for the case of CLC with an anisotropic local absorption are presented and analyzed. It is shown that the CLC layers with locally anisotropic absorption reduce the EM and DM lifetimes (and increase the lasing threshold) in the way different from the case of CLC with an isotropic local absorption. Due to the Borrmann effect revealing of which is different at the opposite stop-band edges in the case of CLC layers with an anisotropic local absorption the EM life-times for the EM frequencies at the opposite stop-bands edges may be significantly different. The options of experimental observations of the theoretically revealed phenomena are briefly discussed.
ISSN:1063-7761
1090-6509
DOI:10.1134/S1063776116040130