Influence of particle-substrate interaction on localized plasmon resonances

Kristy Cherie Vernon, Alison May Funston, Carolina Novo, Daniel Enrique Gomez, Paul Mulvaney, Timothy John Davis

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We present a theory for determining the localized surface plasmon resonance shifts of arbitrarily shaped metal nanoparticles on a substrate. Using a pseudoparticle concept, an expression for the particle substrate interaction is derived, providing both physical insight and formulas to estimate the shifted plasmon resonance, The theory is verified against measured scattering spectra of nanorods on substrates. Simple formulas are provided to calculate the resonance of nanorods, spheres, and ellipsoids on dielectric substrate.
Original languageEnglish
Pages (from-to)2080 - 2086
Number of pages7
JournalNano Letters
Issue number6
Publication statusPublished - 2010
Externally publishedYes

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