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Opt Lett. 2010 Feb 1;35(3):291-3. doi: 10.1364/OL.35.000291.

Fluorescence quenching by a metal nanoparticle in the extreme near-field regime.

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  • 1Institut Langevin, ESPCI ParisTech, CNRS UMR 7587, 10 rue Vauquelin, 75231 Paris CEDEX 05, France.


We study the spontaneous decay rate of a dipole emitter close to a metallic nanoparticle in the extreme near-field regime. The metal is modeled using a nonlocal dielectric function that accounts for the microscopic length scales of the free electron gas. We describe quantitatively the crossover between the macroscopic and microscopic regimes and the enhanced nonradiative decay due to microscopic interactions. Our theory is in agreement with results previously established in the asymptotic near- and far-field regimes.

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