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arXiv · 1112.2814

Mie plasmons: modes volumes, quality factors and coupling strengths (Purcell factor) to a dipolar emitter

G. Colas des Francs·S. Derom·R. Vincent·A. Bouhelier·A. Dereux
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Abstract

Using either quasi-static approximation or exact Mie expansion, we characterize the localized surface plasmons supported by a metallic spherical nanoparticle. We estimate the quality factor $Q_n$ and define the effective volume $V_n$ of the $n^{th}$ mode in a such a way that coupling strength with a neighbouring dipolar emitter is proportional to the ratio $Q_n/V_n$ (Purcell factor). The role of Joule losses, far-field scattering and mode confinement in the coupling mechanism are introduced and discussed with simple physical understanding, with particular attention paid to energy conservation.

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G. Colas des Francs, S. Derom, R. Vincent, A. Bouhelier, A. Dereux. 2011-12-13. Mie plasmons: modes volumes, quality factors and coupling strengths (Purcell factor) to a dipolar emitter. https://doi.org/10.1155/2012%2F175162

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