External factor influence on the optical activity of chiral liquid crystals

Gertruda V. Klimusheva; Andrey G. Iljin; L. P. Yatsenko; Alexander Yu. Vakhnin

doi:10.1117/12.239230

29 April 1996 External factor influence on the optical activity of chiral liquid crystals

Gertruda V. Klimusheva, Andrey G. Iljin, L. P. Yatsenko, Alexander Yu. Vakhnin

Proceedings Volume 2795, Nonlinear Optics of Liquid and Photorefractive Crystals; (1996) https://doi.org/10.1117/12.239230
Event: Nonlinear Optics of Liquid and Photorefractive Crystals, 1995, Ai-Danil, Crimea, Ukraine

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.

Citation Download Citation

Gertruda V. Klimusheva, Andrey G. Iljin, L. P. Yatsenko, and Alexander Yu. Vakhnin "External factor influence on the optical activity of chiral liquid crystals", Proc. SPIE 2795, Nonlinear Optics of Liquid and Photorefractive Crystals, (29 April 1996); https://doi.org/10.1117/12.239230

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