Reflection spectrum of a cholesteric liquid crystal with structural defects |
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Authors: | A. V. Shabanov S. Ya. Vetrov A. Yu. Karneev |
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Affiliation: | (1) Kirenskii Institute of Physics, Siberian Division, Russian Academy of Sciences, Krasnoyarsk, 660036, Russia;(2) Krasnoyarsk State Technical Unversity, Krasnoyarsk, 660074, Russia |
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Abstract: | An expression is obtained for the reflection coefficient of circularly polarized light normally incident on the film of a cholesteric liquid crystal with a variable helix pitch. It is shown that, in the case of a single defect (local change in the helix pitch), the spectrum of light reflection from a cholesteric acquires a dip corresponding to the defect mode. New qualitative features appear in the reflection spectrum of a cholesteric with two defects as the distance between them varies. |
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