We have demonstrated anomalous-dispersion phase-matched second-harmonic generation, using electric-field-induced second-harmonic generation in a liquid solution of Foron Brilliant Blue S-R (FBB). This dye has a sharp absorption maximum near 620 nm and a deep absorption minimum near 450 nm. The microscopic hyperpolarizability (β) of FBB was measured at 1.58 and 0.954 µm and was found to be 163 × 10-30 and -118 × 10-30 cm5/esu, respectively. The change in sign of β and the observation that β0, a frequency-independent measure of hyperpolarizability, is the same at both frequencies demonstrate the validity of the two-state model of the second-order hyperpolarizability.
© 1989 Optical Society of America
P. A. Cahill, K. D. Singer, and L. A. King, "Anomalous-dispersion phase-matched second-harmonic generation," Opt. Lett. 14, 1137-1139 (1989)