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Onset of parametric electroconvection in a nematic liquid crystal

  • Optics, Quantum Electronics
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Abstract

The behavior of a nematic liquid crystal (NLC) in an external ac electric field is studied in terms of the weak electrolyte model. Since electroconvection of certain types of NLCs can occur in a constant field in an oscillatory mode, a quasi-periodic response of a nematic to the external action is possible in an ac field, as well as a sharp reduction of the electroconvective stability thresholds at resonance frequencies. Stability maps for NLCs are plotted on the plane of amplitude-frequency parameters of the external field. Phase portraits are constructed for subharmonic and synchronous perturbations. The optical response of a NLC in the ac electric field is studied; the time dependences of the relative intensity of light, which passed through the nematic liquid crystal cell, are obtained.

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Authors and Affiliations

  1. Perm State University, ul. Bukireva 15, Perm, 614990, Russia

    A. N. Mordvinov & B. L. Smorodin

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  1. A. N. Mordvinov
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  2. B. L. Smorodin
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Original Russian Text © A.N. Mordvinov, B.L. Smorodin, 2011, published in Zhurnal Tekhnicheskoĭ Fiziki, 2011, Vol. 81, No. 5, pp. 89–96.

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Mordvinov, A.N., Smorodin, B.L. Onset of parametric electroconvection in a nematic liquid crystal. Tech. Phys. 56, 676–683 (2011). https://doi.org/10.1134/S1063784211050239

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  • DOI: https://doi.org/10.1134/S1063784211050239

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