We report an five-fold overall enhacement of upconvertion emission in NaYF4:Yb/Er nanocryatals when coupled with gold island films. Spectroscopic studies show that the enhancement factors are hlighly depdent on the exact spectral positions and excitation power density, with a largest enhancement factor more than 12 observed at slected spectral position, which may be attributed to different upconversion processes involved.

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

245th National Meeting (2013)

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