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Up-conversion enhancement in Er doped TiO through plasmonic coupling: Experiments and finite-element modeling

Applied Physics Letters, ISSN: 0003-6951, Vol: 106, Issue: 5
2015
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Metrics Details

  • Citations
    20
    • Citation Indexes
      20
  • Captures
    21

Article Description

Silver nanoparticles, placed on top of an Er doped TiO thin film, were investigated as a means of achieving enhanced up-conversion. Finite-element modeling was used to determine the nanoparticle dimensions (height and diameter) yielding the largest plasmonic enhancement for an incident light wavelength of 808 nm. In order to mimic the experimentally observed up-conversion enhancement, the electric-field enhancement from the Ag nanoparticles was integrated over the entire thickness of the thin film. Based on these calculations, four samples were prepared and tested. The trends predicted by the models were found to correlate well with the trends of the experimentally obtained plasmonic enhanced up-conversion yields. The largest plasmonic enhancement for 808 nm excitation was observed for Ag nanoparticles of diameter 91 ± 5 nm and height 14 ± 1 nm, yielding 163-and 51-fold enhancements for the green (525 nm and 550 nm) and red (660 nm) emissions peaks, respectively.

Bibliographic Details

Sabrina R. Johannsen; Brian Julsgaard; Peter Balling; Arne Nylandsted Larsen; Søren P. Madsen; Jens V. Nygaard; Bjarke R. Jeppesen

AIP Publishing

Physics and Astronomy

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