Open AccessParticle-particle interactions in large, sparse arrays of randomly distributed plasmonic metal nanoparticles: a two-particle model
Author(s) -
Emil H. Eriksen,
Brian Julsgaard,
Steen Madsen,
Harish Lakhotiya,
Adnan Nazir,
Péter Balling
Publication year - 2017
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.019354
Subject(s) - particle (ecology) , plasmon , materials science , nanoparticle , extinction (optical mineralogy) , optics , field (mathematics) , molecular physics , physics , nanotechnology , oceanography , mathematics , geology , pure mathematics
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.