Effects of polarization azimuth in dynamics of electrically assisted   light-induced gliding of nematic liquid-crystal easy axis
  We experimentally study the reorientation dynamics of the nematic liquid crystal easy axis at photoaligned azo-dye films under the combined action of in-plane electric field and reorienting UV light linearly polarized at varying polarization azimuth, $\phi_p$. In contrast to the case where the light polarization vector is parallel to the initial easy axis and $\phi_p=0$, at $\phi_p\ne 0$, the pronounced purely photoinduced reorientation is observed outside the interelectrode gaps. In the regions between electrodes with non-zero electric field, it is found that the dynamics of reorientation slows down with $\phi_p$ and the sense of easy axis rotation is independent of the sign of $\phi_p$. 
A.V. Dubtsov, S.V. Pasechnik, Alexei D. Kiselev, D.V. Shmeliova, V.G.   Chigrinov
cond-mat.soft cond-mat.mtrl-sci