This manuscript reports on the interaction between 2 F 5/2 â †' 2 F 7/2 radiative transition from Yb 3+ 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 Yb 3+ 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 Yb 3+ 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 Yb 3+ ions in the near-infrared region. This plasmon-photon conversion was evaluated from the cavityâ €™ s quality factor (Q) and the coupling (g) between the nanoparticles and the Yb 3+ ions. We have found samples of low-quality cavities and strong coupling between the nanoparticles and the Yb 3+ 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.
Bibliographical noteFunding Information:
This research was supported by Brazilian agencies CAPES, CNPq and FAPESP through the INOF/CEPOF (Instituto Nacional de Óptica e Fotônica and Centro de Pesquisa em Óptica e Fotônica – São Paulo-Brasil) and the Canadian Excellence Research Chair program (CERC) on Enabling Photonic Innovations for Information and Communication. The authors are also grateful to the Natural Sciences and Engineering Research Council of Canada (NSERC), the Fonds de Recherche Québecois sur la Nature et les Technologies (FRQNT) and the Canada Foundation for Innovation (CFI) for the financial support.
Copyright 2016 Elsevier B.V., All rights reserved.