Dresden 2009 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 54: Nano-optics of metallic and semiconducting nanostructures (experiments II)
O 54.6: Vortrag
Donnerstag, 26. März 2009, 16:15–16:30, SCH A216
Photoluminescence enhancement of Sm3+ ions in the vicinity of noble-metal nanoparticles — •Florian Hallermann, Andreas Schmitz, and Gero von Plessen — Institute of Physics (IA), RWTH Aachen University, 52056 Aachen, Germany
The photoluminescence intensity of an optical emitter changes when placed in close proximity to a noble-metal nanoparticle, due to two contributions. First, the optical near-field of the nanoparticle leads to a change in excitation rate of the emitter. Secondly, the emission efficiency is changed due to an optical energy transfer from the emitter to the metal nanoparticle, which provides additional radiative and non-radiative decay channels. In this work we investigate the photoluminescence of Sm3+ ions, which are embedded in SiO2. The photoluminescence spectrum of ions in proximity to single silver and gold nanoparticles is measured. The influence of the spectral position of the nanoparticle plasmon peak on the photoluminescence yield will be discussed and compared with model calculations.