We show that the optical phase-conjugated reflectivity from silver and gold colloids is enhanced by several orders of magnitude. The reflectivity on resonance is comparable with that of CS2 for metal-particle volume concentration of a few parts in 106. We trace this enhancement to the nonlinearities of the electrons in the metal particles and extract the value of their optical Kerr-effect coefficient.
© 1985 Optical Society of America
Original Manuscript: May 24, 1985
Manuscript Accepted: July 30, 1985
Published: October 1, 1985
D. Ricard, Ph. Roussignol, and Chr. Flytzanis, "Surface-mediated enhancement of optical phase conjugation in metal colloids," Opt. Lett. 10, 511-513 (1985)