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O: Fachverband Oberflächenphysik

O 49: Particles and Clusters

O 49.8: Vortrag

Mittwoch, 27. Februar 2008, 17:00–17:15, MA 005

Fluorescence yield of optical emitters close to noble-metal nanoparticles — •Florian Hallermann and Gero von Plessen — I. Institute of Physics (IA), RWTH Aachen University, 52056 Aachen, Germany

The intensity of fluorescence from a fluorescent emitter is modified when placed in close proximity to a noble-metal nanoparticle. This modification is partially caused by a change in excitation efficiency due to the local-field enhancement near the nanoparticle, and partially by additional radiative and non-radiative decay processes due to resonant energy transfer from the emitter to the metal. Here we calculate the total fluorescence yield of fluorescent emitters distributed uniformly around a noble-metal nanoparticle, as a function of excitation and emission wavelengths.