Abstract
The electro-optic properties of the reflected light in a reflective mode, 45°-twisted nematic liquid crystal (TNLC) cell were investigated in the voltage regions near and away from the Freedericksz transition threshold. The measured reflectivity away from the threshold voltage ( V th) could not be described by the model which assumes a constant tilt angle as well as a linearized distribution of twist angle across the cell, although the data are well fitted near V th. We found that in the voltage region away from V th, the model considering the distributions of the tilt angle and the twist angle should be applied for the calculation of the reflectivity. The director-axis distributions were obtained from the numerical integration of the Euler–Lagrange equation.
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