Abstract
Abstract Short pitch ferroelectric liquid crystal is homogeneously dispersed in a polymer matrix. By unidirectional stretching of the composite material, the initial spherical form of the droplets is transformed into an anisometric one where the helix axis is found to lie in the plane of the sample and essentially along the stretching direction. Thus, such a thin film appears to be highly birefringent with the optic axis coinciding with the helix direction. An electric field applied across the sample, due to DHF (deformed helix ferroelectric) effect, causes a deviation of the optic axis in the droplets. The deviation is linearly dependent on the magnitude and polarity of the applied field, respectively. A large induced tilt of the optic axis and response times in the microsecond range have been found in most of the investigated composite materials. A comparison between the electro-optic characteristics of the liquid crystal materials before and after being dispersed in the polymer matrix is made. Moreover...
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