Experimental Investigation of the Polarization Plane Rotation of Light in Cholesteric Liquid-Crystalline Film with an Anisotropic Defect Layer

This paper experimentally demonstrated that in the cholesteric liquid-crystalline films it is possible to induce defect, which can be controlled by external electric field. Three cases of induced defects were examined and the main result of the experiment is that the rotation of polarization plane h...

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Bibliographic Details
Published in:Molecular Crystals and Liquid Crystals 2012-07, Vol.559 (1), p.23-30
Main Authors: Alaverdyan, R. B., Gevorgyan, A. H., Gharagulyan, H., Grigoryan, H.
Format: Article
Language:English
Subjects:
Anisotropy
Atoms & subatomic particles
Chiral photonic crystals
cholesteric liquid crystals
Crystal defects
Crystals
defect structures
Electric fields
Liquid crystals
Mathematical analysis
Molecular chemistry
Planes
Polarization
Polarizers
selective reflection
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Summary:This paper experimentally demonstrated that in the cholesteric liquid-crystalline films it is possible to induce defect, which can be controlled by external electric field. Three cases of induced defects were examined and the main result of the experiment is that the rotation of polarization plane has maximum value when light first propagates through chiral liquid-crystalline photonic structure and then falls to the anisotropic layer. We have also supporting calculations, showing an agreement between experimental results and theoretical calculations. We present a new liquid crystal device configuration that performs as a tunable linear polarizer for both polarized and unpolarized lights.
ISSN:1542-1406
1563-5287
1527-1943
DOI:10.1080/15421406.2012.658679