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arXiv · 1011.3399

Substrate influence on the plasmonic response of clusters of spherical nanoparticles

Paul Anton Letnes·Ingve Simonsen·D. L. Mills
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Abstract

The plasmonic response of nanoparticles is exploited in many subfields of science and engineering to enhance optical signals associated with probes of nanoscale and subnanoscale entities. We develop a numerical algorithm based on previous theoretical work that addresses the influence of a substrate on the plasmonic response of collections of nanoparticles of spherical shape. Our method is a real space approach within the quasi-static limit that can be applied to a wide range of structures. We illustrate the role of the substrate through numerical calculations that explore single nanospheres and nanosphere dimers fabricated from either a Drude model metal or from silver on dielectric substrates, and from dielectric spheres on silver substrates.

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Paul Anton Letnes, Ingve Simonsen, D. L. Mills. 2011-01-07. Substrate influence on the plasmonic response of clusters of spherical nanoparticles. https://doi.org/10.1103/physrevb.83.075426

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