Temporal instability due to competing spatial patterns in liquid crystals in the light field

    Authors

    N. V. Tabiryan; A. L. Tabiryan-Murazyan; V. Carbone; G. Cipparrone; C. Umeton; C. Versace;T. Tschudi

    Comments

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    Abbreviated Journal Title

    Opt. Commun.

    Keywords

    NONLINEAR DYNAMICS; FILM; Optics

    Abstract

    We unveil the physical origin of the peculiar spatio-temporal instability phenomena observed in liquid crystals subject to the influence of a light wave of ordinary polarization. Our study shows that due to non-adiabatic propagation of a light beam in an anisotropic medium, the Light polarization and, hence? the torque acting on the orientation of a nematic liquid crystal (NLC) is asymmetrically modulated over the NLC layer. The spatial pattern of the NLC reorientation that is formed across the NLC-layer under the influence of such a torque may become unstable in time due to competing interaction of symmetric and antisymmetric modes. The obtained results allow evaluation of the threshold intensity and the range of the light incidence angles where the longitudinal spatio-temporal instability is possible. (C) 1998 Elsevier Science B.V. All rights reserved.

    Journal Title

    Optics Communications

    Volume

    154

    Issue/Number

    1-3

    Publication Date

    1-1-1998

    Document Type

    Article

    Language

    English

    First Page

    70

    Last Page

    74

    WOS Identifier

    WOS:000075525600015

    ISSN

    0030-4018

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