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ABSTRACT
The dynamics of the light-induced director rotation has been studied for a comb-shaped polymers in nematic phase with a small amount (0.05 wt %) of azobenzene-dye additive. The effect of temperature on the rotational viscosity and nonlinear optical response of the liquid crystalline polymers was investigated. The orientational processes occured at the beam intensity ∼0.5 W/cm2. Cooling the samples below the glass temperature results in the memory effect.
Funding
This study was supported by the Russian Foundation for Basic Research (projects no. 14-02-00791 and no. 16-29-05140-ofi_m), the Russian Science Foundation (project no. 14-13-00379, synthesis of polymers, preparation of mixtures, and their characterization, A. Yu. Bobrovsky, N. I. Boiko, V. P. Shibaev), and the Education and Science Complex of the Lebedev Physical Institute.