Surface enhanced resonant Raman scattering induced by silver thin films close to the percolation threshold

The electromagnetic field of an incoming wave has already been found to be enhanced close to the surface of a thin granular or rough silver film. We use Surface Enhanced Resonant Raman Scattering (SERRS) as a test of this enhancement close to the percolation threshold (pc). The scattered light shows a maximum below pc, then a minimum close to pc and goes up above.