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Proceedings Paper

Enhancement of QDs photoluminescence by localized surface plasmon effect of Au-NPs
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Paper Abstract

Photoluminescence enhancement of CdSe/CdS/ZnS QDs by localized surface plasmon resonance of large Au-NPs has been investigated. The photoluminescence of the QDs with an emission wavelength at 620 nm in a PMMA matrix is enhanced by immobilized Au-NPs. By considering the lifetime and excitation dependent photoluminescence we realized that the emission and excitation rate enhancements both contributed to the total photoluminescence enhancement. PL measurements were carried out for different sizes of Au-NPs to find out their influences on the emission of QDs. The largest enhancement is achieved by applying 80 nm Au-NPs. Silanization method gives us the opportunity easily to prepare samples with different concentrations of Au-NPs. It is revealed that increasing the concentration of the Au-NPs layer provides higher scattering cross section which contributes in PL enhancement.

Paper Details

Date Published: 1 May 2012
PDF: 7 pages
Proc. SPIE 8424, Nanophotonics IV, 842436 (1 May 2012); doi: 10.1117/12.922778
Show Author Affiliations
Esmaeil Heydari, Fraunhofer-Institut für Angewandte Polymerforschung (Germany)
Tonino Greco, Fraunhofer-Institut für Angewandte Polymerforschung (Germany)
Joachim Stumpe, Fraunhofer-Institut für Angewandte Polymerforschung (Germany)

Published in SPIE Proceedings Vol. 8424:
Nanophotonics IV
David L. Andrews; Jean-Michel Nunzi; Andreas Ostendorf, Editor(s)

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