Yj. Li et al., Two-photon absorption and fluorescence of a novel compound trans-1,3,5-tri-(4-N,N-dimethylaminobenzylstyryl)-acetylacetone, CHIN PHYS L, 18(2), 2001, pp. 205-207
Large two-photon absorption cross section of a novel compound trans-1,3, 5-
tri-(4-N,N-dimethylaminobenzylstyryl)-acetylacetone is measured to be sigma
(2) = 8.4 x 10(-20) cm(4)/GW or o(2)' = 1.594 x 10(-47) cm(4)/(photon-s) b
y using a 1064 nm Nd:YAG laser with 35 ps pulse width based on the intensit
y-dependent transmissivity measurement. The frequency upconversion fluoresc
ence is observed by two-photon laser pumping. This material is an ideal can
didate for optical limiting and upconversion fluorescence.