N. Matsuoka et al., Second-order nonlinearity and optical image storage in phenyl-silica hybrid films doped with azo-dye chromophore using optical poling technique, OPT COMMUN, 185(4-6), 2000, pp. 467-472
4-[N-ethyl-N-(2-hydroxyethyl)]amino-4'-nitro-azobenzene (DR1)-doped phenyl
group substituted silica films were prepared by a sol-gel method. The films
were optically poled by the coherent superposition of 1064 and 532 nm beam
s from a Q-switched Nd:YAG laser. To discuss the effects of the modifier gr
oup, interaction between DR1 molecules and the matrix was investigated. The
delocalization of pi electrons occurred between DR1 molecules and the phen
yl-silica hybrid matrix, and that consequently the polarized DR1 molecules
could be stabilized. By use of the optimized optical poling technique, opti
cal storage was successfully demonstrated for a phenyl-silica hybrid film d
oped with DR1. (C) 2000 Published by Elsevier Science B.V.