, Volume 57, Issue 6, pp 815-823

Mathematical model of compensation for dispersion of light polarization states in electrooptical systems based on chiral liquid crystals

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Abstract

Spectral dispersion of the polarization states occurs after passage of linearly polarized light through a thin layer of a chiral nematic crystal along the helical axis. It is clearly pronounced for crystals with a high optical anisotropy and a helical pitch somewhat larger than the light wavelength. The results of numerical analysis of the spectral dependence of polarization states at the output of the liquid crystal layer and the method for compensating for the dispersion are presented for the first time. It is shown that polarization dispersion can be eliminated using phase plates of two types, one of which should have a high anomalous birefringence dispersion. The possibility of developing fast light modulators operating in a wide spectral range is discussed.

Original Russian Text © S.P. Palto, A.V. Alpatova, M.I. Barnik, A.R. Geivandov, B.A. Umanskii, N.M. Shtykov, 2012, published in Kristallografiya, 2012, Vol. 57, No. 6, pp. 918–926.