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Chem Commun (Camb). 2011 Jan 21;47(3):979-81. doi: 10.1039/c0cc03566a. Epub 2010 Nov 16.

Highly spectral dependent enhancement of upconversion emission with sputtered gold island films.

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  • 1Department of Materials Science and Engineering, University of California, Los Angeles, CA 90095, USA.

Abstract

We report a five-fold overall enhancement of upconversion emission in NaYF(4) : Yb/Er nanocrystals when coupled with gold island films. Spectroscopic studies show that the enhancement factors are highly dependent on the exact spectral positions and excitation power density, with a largest enhancement factor of more than 12 observed at selected spectral positions, which may be attributed to different upconversion processes involved.

PMID:
21079884
PMCID:
PMC3236241
DOI:
10.1039/c0cc03566a
[PubMed - indexed for MEDLINE]
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