Optical properties of a nematic liquid crystal under the binary effect of periodic shear and compression

The optical response (clearing) of a liquid crystal cell, containing a layer of a nematic crystal with homeotropic alignment, under the binary effect of periodic shear and compression has been theoretically described. The effect was calculated taking into account the presence of orientational waves arising at displacement of one of the boundary plates in its plane, and the mobility of this plate along the normal upon statement of boundary conditions. The influence on the effect of the alignment energy of molecules at the layer boundaries is analyzed. The calculation results are compared with the experimental data.