Characteristics of Transient Light Scattering in Ferroelectric Liquid Crystals as Functions of Molecular Structure, Cell Thickness and Temperature and Their Applications

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Abstract
Characteristics of transient light scattering associated with domain switching by polarity reversal of field are studied. The rise time of transmission change is proportional to the inverse of applied field E and spontaneous polarization Ps of the used material, indicating driving torque of PsE. The decay time is shorter in ferroelectric liquid crystals with higher dispersion frequency of dielectric constant and also in thinner cells. The contrast is strongly dependent on the wave form of the applied voltage pulse. For example, the maximum contrast was observed for some pulse width, which depends on wave length of light. These results are discussed in terms of spontaneous polarization, relaxation frequency, tilt angle, helicoidal pitch and viscosity etc..

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