Complex nonlinear behavior in optically excited nematic liquid crystals.
We present a study of the passage of a monochromatic, linearly polarized cw laser beam through a cell of homeotropically aligned nematic liquid crystal at a slightly oblique angle. The light is polarized perpendicular to the plane of incidence. Experiments in this geometry have revealed the existence of complex, time-dependent dynamics of the director motion. We present a model for the director dynamics derived from the basic equations that shows both periodic and chaotic behavior at different light intensities as observed in the experiments. The model we derive exhibits a variety of complex behaviors, among them an uncommon route to chaos via gluing bifurcations that has not yet been observed in any real physical system.
Demeter
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Physikalisches Institut der Universität Bayreuth, D-95440 Bayreuth, Germany.