Abstract
We have used a high-intensity tunable picosecond infrared laser source to measure the spectral content of light scattered near the second harmonic for two well-known organic dyes, p-Nitroaniline and Disperse Red 1, at a number of wavelengths in the near infrared. We found that in Disperse red 1 a broad two-photon fluorescence competes with the sharp hyper-Rayleigh peak. Further, dephasing of the virtual excited state leads to elimination of hyper-Rayleigh scattering in favor of fluorescence if the harmonic is in the linear absorption tail. We determined the dispersion of the magnitude of the first hyperpolarizability for both dyes, using a simple referencing technique, and found it to be consistent with that of a two-level dispersion model.
© 1996 Optical Society of America
Full Article | PDF ArticleMore Like This
S. Stadler, R. Dietrich, G. Bourhill, and Ch. Bräuchle
Opt. Lett. 21(4) 251-253 (1996)
Geert Olbrechts, Kurt Wostyn, Koen Clays, and André Persoons
Opt. Lett. 24(6) 403-405 (1999)
V. Ostroverkhov, R. G. Petschek, K. D. Singer, L. Sukhomlinova, R. J. Twieg, S.-X. Wang, and L. C. Chien
J. Opt. Soc. Am. B 17(9) 1531-1542 (2000)