Single-molecule spontaneous emission close to absorbing nanostructures

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  • M. Thomas
    Laboratoire d’Energétique Moléculaire et Macroscopique, Combustion, Ecole Centrale Paris , Centre National de la Recherche Scientifique, 92295 Châtenay-Malabry Cedex, France
  • J.-J. Greffet
    Laboratoire d’Energétique Moléculaire et Macroscopique, Combustion, Ecole Centrale Paris , Centre National de la Recherche Scientifique, 92295 Châtenay-Malabry Cedex, France
  • R. Carminati
    Laboratoire d’Energétique Moléculaire et Macroscopique, Combustion, Ecole Centrale Paris , Centre National de la Recherche Scientifique, 92295 Châtenay-Malabry Cedex, France
  • J. R. Arias-Gonzalez
    Department of Physics, University of California , Berkeley, California 94720

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<jats:p>The spontaneous emission of a single molecule is substantially modified close to a metallic nanostructure. We study the spectral behavior of the radiative and nonradiative decay rates and of the local-field factor in the vicinity of a plasmon resonance. We show that the highest fluorescence enhancement is obtained for an emission wavelength redshifted from the plasmon resonance, and that quenching always dominates at plasmon resonance. These results may have experimental implications in spectroscopy and monitoring of elementary light sources.</jats:p>

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