Radiative frequency shifts in nanoplasmonic dimers
Downing, CA; Mariani, E; Weick, G
Date: 9 October 2017
Journal
Physical Review B
Publisher
American Physical Society
Publisher DOI
Abstract
We study the effect of the electromagnetic environment on the resonance frequency of plasmonic excitations in dimers of interacting metallic nanoparticles. The coupling between plasmons and vacuum electromagnetic fluctuations induces a shift in the resonance frequencies, analogous to the Lamb shift in atomic physics, which is usually ...
We study the effect of the electromagnetic environment on the resonance frequency of plasmonic excitations in dimers of interacting metallic nanoparticles. The coupling between plasmons and vacuum electromagnetic fluctuations induces a shift in the resonance frequencies, analogous to the Lamb shift in atomic physics, which is usually not measurable in an isolated nanoparticle. In contrast, we show that this shift leads to sizeable corrections to the level splitting induced by dipolar interactions in nanoparticle dimers. The ratio between the level splitting for the longitudinal and transverse hybridized modes takes a universal form dependent only on the interparticle distance and thus is highly insensitive to the precise fabrication details of the two nanoparticles. We discuss the possibility to successfully perform the proposed measurement using state-of-the-art nanoplasmonic architectures.
Physics and Astronomy
Faculty of Environment, Science and Economy
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