19 January 1996 Asymmetry of Bragg reflective band of cholesteric liquid crystal caused by doping molecules
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Proceedings Volume 2731, International Liquid Crystal Workshop on Surface Phenomena; (1996) https://doi.org/10.1117/12.230641
Event: International Liquid Crystal Workshop: Surface Phenomena, 1995, St. Petersburg, Russian Federation
Abstract
We report the effect of Asymmetry of Bragg reflective band of Cholesteric Liquid CRystal caused by the excited doping molecules of 4-phenilchalkon. Two possible reasons giving the explanation of the effect are nonuniform concentration of khalkon molecules in the bulk and absorption of the molecules on the inner surfaces of the cells. The influence of nonuniform variations of pitch step and the refractive index modulation on the shape of Bragg band are studied numerically. It has been shown that the variations of pitch step are probably the reason of asymmetry of the Bragg band. The used model is based on solving the equations of the Theory of Dynamical Reflection for the wave propagates along the cholesteric director axis.
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Sergei F. Lyuksyutov, Yuri A. Reznikov, Eugene A. Tikhonov, "Asymmetry of Bragg reflective band of cholesteric liquid crystal caused by doping molecules", Proc. SPIE 2731, International Liquid Crystal Workshop on Surface Phenomena, (19 January 1996); doi: 10.1117/12.230641; https://doi.org/10.1117/12.230641
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