Reorientational nonlinear phenomena in thin nematic liquid crystal layer

In this paper the detailed study of the self-diffraction phenomena due to r eorientational optical nonlinearity in nematic liquid crystalline cell is p resented. The optical nonlinear effect is additionally modified by external low-frequency electric field. The dependence of nonlinear response on ligh t polarization is also analyzed. The theoretical investigations are compare d with experimental results and the theoretical predictions are in excellen t agreement with experimental data.