Dubtsov A V, Pasechnik S V, Kiselev Alexei D, Shmeliova D V, Chigrinov V G
Moscow State University of Instrument Engineering and Computer Science, Stromynka 20, 107846 Moscow, Russia.
Phys Rev E Stat Nonlin Soft Matter Phys. 2010 Jul;82(1 Pt 1):011702. doi: 10.1103/PhysRevE.82.011702. Epub 2010 Jul 2.
We study azimuthal gliding of the easy axis that occurs in nematic liquid crystals brought in contact with the photoaligned substrate (initially irradiated azo-dye film) under the action of reorienting UV light combined with in-plane electric field. For irradiation with the linearly polarized light, dynamics of easy axis reorientation is found to be faster as compared to the case of nonpolarized light. Another effect is that it slows down with the initial irradiation dose used to prepare the azo-dye film. This effect is interpreted by using the previously suggested phenomenological model. We present the theoretical results computed by solving the torque balance equations of the model that agree very well with the experimental data.
我们研究了在重新取向的紫外光与面内电场共同作用下，向列型液晶与光取向基板（初始照射的偶氮染料薄膜）接触时易轴发生的方位角滑动。对于线偏振光照射，发现易轴重新取向的动力学比非偏振光的情况更快。另一个效应是，它会随着用于制备偶氮染料薄膜的初始照射剂量而减慢。利用先前提出的唯象模型对这一效应进行了解释。我们给出了通过求解该模型的扭矩平衡方程计算得到的理论结果，这些结果与实验数据非常吻合。
