Two-Photon Absorption and Fluorescence of a Novel Compound Trans-1,3,5-tri-(4-N,N-Dimethylaminobenzylstyryl)-Acetylacetone

Large two-photon absorption cross section of a novel compound trans-1,3,5-tri-(4-N,N-dimethylaminobenzylstyryl)-acetylacetone is measured to be σ 2 = 8.4 × 10 -20 cm 4 /GW or σ 2 ' = 1.594 × 10 -47 cm 4 /(photon·s) by using a 1064 nm Nd:YAG laser with 35 ps pulse width based on the intensity-dependent transmissivity measurement. The frequency upconversion fluorescence is observed by two-photon laser pumping. This material is an ideal candidate for optical limiting and upconversion fluorescence.