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Highly spectral dependent enhancement of upconversion emission with sputtered gold island films
1Department of Materials Science and Engineering, University of California, Los Angeles, CA 90095, USA.
Chemical Communications (Cambridge, England)
|November 17, 2010
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.
