Particle-particle interactions in large, sparse arrays of randomly distributed plasmonic metal nanoparticles: a two-particle model

Emil Eriksen, Brian Julsgaard, Søren Peder Madsen, Harish Lakhotiya, Adnan Nazir, Peter Balling

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisTidsskriftartikelForskningpeer review

Abstract

A two-particle model is proposed which enables the assessment of particle-particle interactions in large, sparse arrays of randomly distributed plasmonic metal nanoparticles of arbitrary geometry in inhomogeneous environments. The two-particle model predicts experimentally observed peak splittings in the extinction cross section spectrum for randomly distributed gold nanocones on a TiO 2:Er 3+ thin film with average center-to-center spacings of 3-5 diameters. The main physical mechanism responsible is found to be interference between the incident field and the far-field component of the single-particle scattered field which is guided along the film.

OriginalsprogEngelsk
TidsskriftOptics Express
Vol/bind25
Nummer16
Sider (fra-til)19354-19359
Antal sider6
ISSN1094-4087
DOI
StatusUdgivet - 2017

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