Abstract
The excitation of a collective vibration of the electron gas inside a large metallic cluster ("surface plasmon excitation”) by means of. e.g., laser irradiation gives rise to a large enhancement of the electromagnetic field at the cluster surface [1]. This increase in field strength is believed to be one of the main causes for the surface-enhancement of nonlinear processes such as Raman scattering (SERS) [2], second harmonic generation [3] or degenerate four wave mixing [4].
© 1996 IEEE
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