Substrate effects on surface-plasmon spectra in metal-island films

P. Royer, J. P. Goudonnet, R. J. Warmack, T. L. Ferrell

Research output: Contribution to journalArticlepeer-review

139 Scopus citations

Abstract

The effects of the local dielectric environment on the surface-plasmon resonances of annealed metal-island films are studied experimentally and modeled theoretically. Silver-island films were annealed to produce spheroidal shaped particles which exhibit well-resolved resonances in polarized, angle-resolved, absorption spectra. These resonances are shifted in different amounts by the depolarizing interaction with the underlying substrate. They are also affected by additional dielectric coverages or separation of the particle film from the substrate. Cross-section calculations based upon a nonretarded, single-particle, dielectric interaction for these various configurations are presented and found to be in agreement with experimental observations.

Original languageEnglish
Pages (from-to)3753-3759
Number of pages7
JournalPhysical Review B
Volume35
Issue number8
DOIs
StatePublished - 1987
Externally publishedYes

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