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Resonant SPP modes supported by discrete metal nanoparticles on high-index substrates

Beck, F J; Verhagen, E; Mokkapati, S; Polman, A; Catchpole, K R


We provide a new physical interpretation of scattering from plasmonic nanoparticles on high-index substrates. We demonstrate the excitation of different types of resonant modes on disk-shaped, Ag nanoparticles. At short wavelengths, the resonances are localised at the top of the particle, while at longer wavelengths they are localised at the Ag/substrate interface. We attribute the long wavelength resonances to geometric resonances of surface plasmon polaritons (SPPs) at the Ag/substrate...[Show more]

CollectionsANU Research Publications
Date published: 2011-03-14
Type: Journal article
Source: Optics express
DOI: 10.1364/OE.19.00A146


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