Theory of light reflection by cholesteric liquid crystals possessing a tilted structure

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Abstract
It has long been known that thin films of cholesteric liquid crystals subject to a shear will exhibit a blue shift in the color that they reflect. In this article a molecular structure that could explain this shift is postulated. Using Mauguin’s continuum model of a cholesteric liquid crystal, the governing electromagnetic field equations are formulated. An approximate, analytic solution is obtained by a perturbation technique. The results are consistent with the available experimental data.

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