摘要
利用波导技术研究了在不同温度下铁电液晶(简体FLC)垂直排列的光学特性.通过计算机对与入射光角度相关的反射率理论数据与实验数据进行拟合计算,测定了一系列与FLC有关的参数,给出了在S_C相FLC分子的排列模型,讨论了在这个相中分子指向矢的扭曲角和倾斜角.
The excitation of optical modes is used to study the optical tensor configuration in a thin ferroelectric liquid crystal layer, cooled from the initially homeotropically aligned ncmatic phase. By monitoring the angular dependent reflectivity for plane polarized radiation coupled into the guided modes in the smectic C layer and subsequently fitting the recorded data to predictions from multilayer optics theory the optical tensor configuration in the layer is fully evaluated. Itcrativcly modelling the full tilt/twist profile in the cell progressively converging the predicted reflectivity to experimental data gives a complete and very well specified picture of the optical tensor throughout the cell. By studying the cell at various temperatures ,the temperature dependence of the tilt of the major axis of the optic tensor has been established .which may be related to the cone angle if the smectic layers are paraded to the cell surface. The temperature dependent optical dielectric constants have also been obtained.
出处
《液晶通讯》
CAS
1993年第2期59-63,共5页
