Dynamics of magnetic (electric) field induced perturbation in homeotropic smectic A structure in liquid crystal cell with substrates having periodic microrelief.

The dynamics of a magnetic (electric) field induced perturbation in a homeotropic smectic A (SmA) structure in liquid crystal cells with substrates having periodic microrelief has been investigated. It has been shown that relaxation times of such perturbation in both switching-on and switching-off regimes are of the order of 10-5-10-4s. The results obtained show that previously proposed novel electro (magneto) optic effect in such SmA cell can be utilized in manufacturing of liquid crystal displays with operating times much shorter than those of ordinary modern displays based on the Freedericksz transitions in nematic liquid crystals.