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Light transmission of polymer-dispersed liquid crystal layer composed of droplets with inhomogeneous surface anchoring

  • Physical Optics
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Abstract

We have developed a model and realized an algorithm for the calculation of the coefficient of coherent (direct) transmission of light through a layer of liquid crystal (LC) droplets in a polymer matrix. The model is based on the Hulst anomalous diffraction approximation for describing the scattering by an individual particle and the Foldy-Twersky approximation for a coherent field. It allows one to investigate polymer dispersed LC (PDLC) materials with homogeneous and inhomogeneous interphase surface anchoring on the droplet surface. In order to calculate the configuration of the field of the local director in the droplet, the relaxation method of solving the problem of minimization of the free energy volume density has been used. We have verified the model by comparison with experiment under the inverse regime of the ionic modification of the LC-polymer interphase boundary. The model makes it possible to solve problems of optimization of the optical response of PDLC films in relation to their thickness and optical characteristics of the polymer matrix, sizes, polydispersity, concentration, and anisometry parameters of droplets. Based on this model, we have proposed a technique for estimating the size of LC droplets from the data on the dependence of the transmission coefficient on the applied voltage.

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Authors and Affiliations

  1. Stepanov Institute of Physics, National Academy of Sciences of Belarus, Minsk, 220072, Belarus

    V. A. Loiko, A. V. Konkolovich & A. A. Miskevich

  2. Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russia

    V. Ya. Zyryanov

Authors
  1. V. A. Loiko
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  2. V. Ya. Zyryanov
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  3. A. V. Konkolovich
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  4. A. A. Miskevich
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Correspondence to V. A. Loiko.

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Original Russian Text © V.A. Loiko, V.Ya. Zyryanov, A.V. Konkolovich, A.A. Miskevich, 2016, published in Optika i Spektroskopiya, 2016, Vol. 120, No. 1, pp. 158-168.

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Loiko, V.A., Zyryanov, V.Y., Konkolovich, A.V. et al. Light transmission of polymer-dispersed liquid crystal layer composed of droplets with inhomogeneous surface anchoring. Opt. Spectrosc. 120, 143–152 (2016). https://doi.org/10.1134/S0030400X16010112

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  • DOI: https://doi.org/10.1134/S0030400X16010112

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