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Proceedings Paper

Light-induced nonlinear bleaching of the CLC film under the conditions of selective reflection
Author(s): Svetlana G. Lukishova; Konstantin S. Lebedev; Ekaterina A. Magulariya
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Paper Abstract

We have observed lowering of reflectivity (from approximately 90 to 95% up to approximately 50 - 70%) of the cholesteric liquid crystal (CLC) mirrors under the nonlinear action of circular polarized laser radiation. The possibility is considered of nonthermal but light-field induced helical pitch dilation and untwisting. It should be mentioned that it is the first experiment to our knowledge (the special laser operation was chosen, so that the changes of pitch can be accumulated) where such strong changes of reflectivity can be explained by nonthermal effects. We also observed defocusing of reflected beam with a near Gaussian spatial profile and changing of the CLC mirror curvature, but we consider that in these experiments thermal effects are more probable.

Paper Details

Date Published: 29 April 1996
PDF: 10 pages
Proc. SPIE 2795, Nonlinear Optics of Liquid and Photorefractive Crystals, (29 April 1996); doi: 10.1117/12.239211
Show Author Affiliations
Svetlana G. Lukishova, Institute of Radioengineering and Electronics (Russia)
Konstantin S. Lebedev, Moscow Institute of Physics and Technology (Russia)
Ekaterina A. Magulariya, Moscow Institute of Physics and Technology (Russia)

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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