Influence of Light Induced Molecular Conformational Transformations and Anchoring Energy on Cholesteric Liquid Crystal Pitch and Dielectric Properties

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Abstract The cholesteric liquid crystal (CLC) pitch and director orientation are obtained as the functions of the anchoring energy W of a director and its pretilt angles Δϑ1, Δϑ2 on the cell orienting surfaces. If the anchoring energy is strong enough, the monotonic change of the CLC twisting ability due, for example, to the light-induced molecular conformational transformatins causes jumps of the CLC pitch and mean values of dielectric susceptibility tensor ⟨ϵ1J⟩. Values of Jumps of ⟨ϵ1J⟩ components are determined by anchoring energy W and pretilt angles Δϑ1, Δϑ2 that may be used for experimental estimations of W, Δϑ1, Δϑ2.