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

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

2011-12-13

arxiv.org/abs/1112.2814v1

International Journal of Optics 2012, 175162 (2012)

Physics

Optics

(in press) International Journal of Optics (2011)

Scientific paper

10.1155/2012/175162

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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