Rivera V A G, Osorio S P A, Ledemi Y, Manzani D, Messaddeq Y, Nunes L A O, Marega E
Instituto de Física de São Carlos-INOF, USP, Caixa Postal 369, 13560-970, São Carlos–SP, Brasil.
Opt Express. 2010 Nov 22;18(24):25321-8. doi: 10.1364/OE.18.025321.
We show the annealing effect on silver and Erbium-doped tellurite glasses in the formation of nanoparticles (NPs) of silver, produced by the reduction of silver (Ag+ → Ag0), aiming to an fluorescence enhancement. The absorption spectra show typical Localized Surface Plasmon Resonance (LSPR) band of Ag0 NP in addition to the distinctive absorption peaks of Er3+ ions. Both observations demonstrate that the photoluminescence enhancement is due to the coupling of dipoles formed by NPs with the Er3+ 4I(13/2) → 4I(15/2) transition. This plasmon energy transfer to the Er3+ ions was observed in the fluorescence spectrum with a blue-shift of the peaks.
