Jánossy István, Fodor-Csorba Katalin, Vajda Anikó, Tóth-Katona Tibor
Institute for Solid State Physics and Optics, Wigner Research Centre for Physics, Hungarian Academy of Sciences, H-1525 Budapest, P. O. Box 49, Hungary.
Phys Rev E Stat Nonlin Soft Matter Phys. 2014 Jan;89(1):012504. doi: 10.1103/PhysRevE.89.012504. Epub 2014 Jan 9.
Liquid crystal layers sandwiched between a reference plate and a photosensitive substrate were investigated. We focused on the reverse geometry, where the cell was illuminated by a laser beam from the reference side. In planar cells both static and dynamic instabilities occurred, depending on the angle between the laser polarization and the director orientation on the reference plate. In cells where the molecules were aligned along the normal of the reference plate, a dynamic pattern was observed at all angles of polarization. A simple model based on a photoinduced surface torque accounts for the findings. Light scattering studies revealed some basic properties of the instabilities.
研究了夹在参考板和光敏基板之间的液晶层。我们关注的是反向几何结构，即从参考侧用激光束照射液晶盒。在平面液晶盒中，根据激光偏振方向与参考板上指向矢方向之间的夹角，会出现静态和动态不稳定性。在分子沿参考板法线排列的液晶盒中，在所有偏振角度下都观察到了动态图案。基于光致表面转矩的简单模型解释了这些发现。光散射研究揭示了不稳定性的一些基本特性。
