Modeling of molecular reorientation and beam propagation in chiral and non-chiral nematic liquid crystals

The exact molecular reorientation model for nematic liquid crystals taking into account all diagonal Frank elastic constants and using two angles to describe director orientation is presented. Solutions and simplified equations are shown for the most common planar and chiral configurations. Gaussian...

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Bibliographic Details
Published in:Optics express 2012-06, Vol.20 (13), p.13923-13938
Main Authors: Sala, Filip A, Karpierz, Miroslaw A
Format: Article
Language:English
Subjects:
Computer Simulation
Elastic Modulus
Light
Liquid Crystals - chemistry
Models, Chemical
Molecular Conformation
Nephelometry and Turbidimetry - methods
Refractometry
Scattering, Radiation
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Summary:The exact molecular reorientation model for nematic liquid crystals taking into account all diagonal Frank elastic constants and using two angles to describe director orientation is presented. Solutions and simplified equations are shown for the most common planar and chiral configurations. Gaussian beam propagation simulated using fully vectorial Beam Propagation Method in nonlinear case is also provided. Detailed comparison between exact solutions and single Frank constant approximation is made. However, no significant differences between these two models were found neither in beam propagation nor in polarization distribution, some difficulties may occur in choosing single Frank constant especially when it comes to quantitative results. Presented results correspond to a propagation of a beam of the Gaussian or topologically similar shapes.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.20.013923