Electrooptic Bistability of Ferroelectric Liquid Crystal Cell Prepared Using Obliquely Evaporated SiO Films

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Abstract
The mechanism of the occurrence of the almost perfect bistability in the electrooptic response of a ferroelectric liquid crystal EO device with obliquely evaporated SiO films is explained by suggesting a model claiming that there is no depolarization field due to the carrier transportation of the SiO films and their very thinness. The validity of this assumption was confirmed by observing the phase relation between the switching currents and the applied triangular-voltage waveforms; in the case where SiO films were utilized, the switching current was shown to occur in the phase with the applied voltage, whereas for a cell with conventional polyimide films there occurred an advance in the phase between the current and the voltage.