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The interaction between the localized plasma resonances associated with small metal particles and surface plasmons on a nearby metal-dielectric interface has been observed. Shifts in the surface-plasmon dispersion relation and changes in the effective absorption of the metal particles (Ag-island resonances) resulting from this interaction were measured as a function of the separation d between the two structures. In our geometry, the two excitations are most strongly coupled for a separation d25 nm.
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Holland et al. (1983) studied this question.
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