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Proceedings Paper

Fluorescence coupling to plasmonic nanoparticles
Author(s): Gernot Schaffernak; Christian Gruber; Joachim R. Krenn; Markus K. Krug; Marija Gašparić; Martin Belitsch; Andreas Hohenau
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Paper Abstract

The combination of single photon emitters (quantum dots) and tailored metal nanoparticles with defined size and shape allows a detailed study of the interaction between light and matter. The enhanced optical near-field of the nanoparticles can strongly influence the absorption and emission of nearby fluorescent quantum dots. We show that a controlled spatial arrangement enables the analysis and understanding of polarization dependent coupling between a metal nanoparticle and few or single fluorescent quantum dots. Modifications in the fluorescence spectrum and lifetime are analyzed and compare well with simulations. The reduction of the fluorescence lifetime in such systems is usually in the order of 3-10. However, much larger reductions are to be expected if the quantum dots are positioned in a nanometric gap between two plasmonic nanoparticles, eventually leading to hot luminescence. We approach this regime experimentally and present first results from lithogaphically fabricated gold particle-pairs with controlled gap widths in the range of 1-20nm.

Paper Details

Date Published: 6 January 2015
PDF: 5 pages
Proc. SPIE 9450, Photonics, Devices, and Systems VI, 94501S (6 January 2015); doi: 10.1117/12.2070333
Show Author Affiliations
Gernot Schaffernak, Karl-Franzens-Univ. Graz (Austria)
Christian Gruber, Karl-Franzens-Univ. Graz (Austria)
Joachim R. Krenn, Karl-Franzens-Univ. Graz (Austria)
Markus K. Krug, Karl-Franzens-Univ. Graz (Austria)
Marija Gašparić, Karl-Franzens-Univ. Graz (Austria)
Martin Belitsch, Karl-Franzens-Univ. Graz (Austria)
Andreas Hohenau, Karl-Franzens-Univ. Graz (Austria)

Published in SPIE Proceedings Vol. 9450:
Photonics, Devices, and Systems VI
Pavel Tománek; Dagmar Senderáková; Petr Páta, Editor(s)

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