We show both theoretically and experimentally by degenerate four-wave mixing that the combined processes of optical rectification and the linear electro-optic effect contribute to the large effective third-order susceptibilities [14χ(3)(CS2)] of the organic salt 4-N, Nˆ- dimethylamino-4′ -N′ -methylstilbazolium toluene-p- sulfonate (DAST). Furthermore, the knowledge of the cascaded contributions was used to determine absolute values of the third-order susceptibilities as well as their sign.
© 1999 Optical Society of America
Ch. Bosshard, I. Biaggio, St. Fischer, S. Follonier, and P. Günter, "Cascaded contributions to degenerate four-wave mixing in an acentric organic crystal," Opt. Lett. 24, 196-198 (1999)