The electromagnetic field mechanism is applied to Raman scattering by molecules embedded in small cavities within metal films. Very strong enhancements, due to excitation of dipolar surface plasmons, may be obtained for appropriately oriented oblate spheroidal cavities, as has been suggested in connection with experiments with coldly deposited Ag films.
© 1985 Optical Society of America
Herman Chew and Milton Kerker, "Surface-enhanced Raman scattering from metal films containing dielectric cavities," J. Opt. Soc. Am. B 2, 1025-1027 (1985)