Abstract
The orientation of liquid-crystal directors in the vicinity of an interface between a glass plate and a liquid-crystal layer is studied under shear horizontal (SH) wave propgation. Propagation characteristics of SH wave in a trilayer structure composed of a liquid-crystal layer sandwiched between two glass plates are numerically analyzed in the form of taking into account the anisotropy of the viscous tensor. The dependence of the acoustic phase delay change on the applied voltage to the liquid crystal layer is numerically related to the liquid-crystal director-angle. The applied voltage dependence of the director-angle is evaluated under the propagation of the 0th and 1st modes of SH wave, when the two modes have the different displacement distributions in the vicinity of the interface with the glass plate. The present technique is promising for evaluating the orientation of liquid-crystal directors without requiring a complicated experiment setup and valid for real-time measurement.
