Ay. Bobrovskii et al., Photochromic chiral liquid-crystalline mixed formulations: A new class of materials for data recording and storage, J OPT TECH, 66(6), 1999, pp. 574-577
This paper describes the phase behavior and optical properties of the mixed
formulation of a chiral 1-menthanone derivative as a photosensitive dopant
and a cholesteric copolymer. It is shown that the exposure of the planar-o
riented films of the mixture to UV radiation considerably decreases the wav
elength of the selective reflection maximum owing to the E-Z isomerization
of the dopant. The kinetics of photoisomerization of the cholesteric films
of the mixture is measured at various temperatures. The mixed formulation p
repared is a unique promising medium for colored data recording and storage
. (C) 1999 The Optical Society of America. [S1070-9762(99)02106-5].