Hs. Zhou et al., Synthesis and nonlinear optical susceptibility of cyanine dye J-aggregatesdoped silica film (II), J SOL-GEL S, 19(1-3), 2000, pp. 803-806
We tried to embed stable J-aggregates of 1,1'-diethyl-2,2'-cyanine bromide
into a thin silica film by simple sol-gel processing. Its third order susce
ptibility \ chi ((3))\ was about 5 x 10(-7) esu at resonance wavelength of
the J band by Z-scan method using a 180-femtosecond pulse laser beam at 77
K in vacuum environment (< 10(-5) Torr). The net \ chi ((3))\ value of pure
J-aggregates should be 4 x 10(-6) esu from the doping ration of J-aggregat
es in silica film.