Abstract

A new model for surface-enhanced Raman scattering is presented that includes the dipole effect of the molecule. Under the effect of an external polarizing field, changes in the molecular dipole significantly change the charge distribution on the metal-sphere surface, thereby increasing the molecular Raman cross section. This process is unrelated to surface-plasmon resonance; quite to the contrary, it is preferred to work away from any such resonance.

© 2004 Optical Society of America

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