Journal
SCIENTIFIC REPORTS
Volume 6, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/srep18464
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Funding
- CAPES
- CNPq
- FAPESP through INOF/CEPOF (Instituto Nacional de Optica e Fotonica and Centro de Pesquisa em Optica e Fotonica - Sao Paulo-Brasil)
- Canadian Excellence Research Chair program (CERC) on Enabling Photonic Innovations for Information and Communication
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- Fonds de Recherche Quebecois sur la Nature et les Technologies (FRQNT)
- Canada Foundation for Innovation (CFI)
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This manuscript reports on the interaction between F-2(5/2) -> F-2(7/2) radiative transition from Yb3+ ions and localized surface plasmon resonance (from gold/silver nanoparticles) in a tungsten-tellurite glass. Such an interaction, similar to the down-conversion process, results in the Yb3+ emission in the near-infrared region via resonant and non-resonant energy transfers. We associated such effects with the dynamic coupling described by the variations generated by the Hamiltonian H-DC in either the oscillator strength, or the local crystal field, i.e. the line shape changes in the emission band. Here, the Yb3+ ions emission is achieved through plasmon-photon coupling, observable as an enhancement or quenching in the luminescence spectra. Metallic nanoparticles have light-collecting capability in the visible spectrum and can accumulate almost all the photon energy on a nanoscale, which enable the excitation and emission of the Yb3+ ions in the near-infrared region. This plasmon-photon conversion was evaluated from the cavity's quality factor (Q) and the coupling (g) between the nanoparticles and the Yb3+ ions. We have found samples of low-quality cavities and strong coupling between the nanoparticles and the Yb3+ ions. Our research can be extended towards the understanding of new plasmon-photon converters obtained from interactions between rare-earth ions and localized surface plasmon resonance.
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