Abstract
Abstract We report observations on nematic droplets of a dual-frequency addressable nematic mixture using polarization microscopy. When low frequency (f = 100 Hz) electric fields are applied, the dielectric anisotropy is positive and the droplets show the usual behaviour, i.e. dark polarization rings which move outward with increasing field strength. When high frequency (f = 50 kHz) fields are applied, however, the dielectric anisotropy is negative and the dark polarization rings move inward with increasing field strength. The appearance of the droplets in transmission is compared to computer-simulated pictures using a simple model which describes the change of the director field within a weak field limit.
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