We report on an experiment with surface-enhanced Raman scattering on gratings overcoated by copper phtalocyanine that shows that, because of the resonant excitation of surface plasmons, a stimulated Raman scattering process occurs. The corresponding threshold value of the pump power is rather low, of the order of 40 mW. This observation was made with a thin (5-nm) film of copper phtalocyanine. The theoretical study is developed by coupled-mode analysis that makes full use of the electromagnetic resonant feature of this nonlinear interaction.
© 1996 Optical Society of America
I. Baltog, N. Primeau, R. Reinisch, and J. L. Coutaz, "Observation of stimulated surface-enhanced Raman scattering through grating excitation of surface plasmons," J. Opt. Soc. Am. B 13, 656-660 (1996)