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Proceedings Paper

External factor influence on the optical activity of chiral liquid crystals
Author(s): Gertruda V. Klimusheva; Andrey G. Iljin; L. P. Yatsenko; Alexander Yu. Vakhnin
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Paper Abstract

Due to its diffractive nature the light polarization plane rotation in cholesterical liquid crystals (CLC) is highly dependent on the parameters of a selective reflection (SR) band of liquid crystal matrix and possesses a number of qualitative peculiarities in contrast to usual liquids, solutions or crystals. The aim of the present work is to study the influence of such parameters as cell thickness, temperature and dye-doping on the optical activity of CLC. A method of precise calculation of the cell gyrotropy and elliptisity of light passed through CLC film is described. The square dependence of polarization plane rotation upon CLC film thickness was established. Abnormally strong light absorption of dye-doped CLC in the 'red' edge of SR band was observed for small dopant concentrations resulting in an asymmetry of polarization plain rotation with respect to the maximum of SR band. On the base of experimental data the possibility to create an electrically controlled two-color CLC light indicator with high color contrast is discussed.

Paper Details

Date Published: 29 April 1996
PDF: 6 pages
Proc. SPIE 2795, Nonlinear Optics of Liquid and Photorefractive Crystals, (29 April 1996); doi: 10.1117/12.239230
Show Author Affiliations
Gertruda V. Klimusheva, Institute of Physics (Ukraine)
Andrey G. Iljin, Institute of Physics (Ukraine)
L. P. Yatsenko, Institute of Physics (Ukraine)
Alexander Yu. Vakhnin, Institute of Physics (Ukraine)

Published in SPIE Proceedings Vol. 2795:
Nonlinear Optics of Liquid and Photorefractive Crystals
Gertruda V. Klimusheva; Andrey G. Iljin, Editor(s)

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