Frequency upconversion properties of Tm3+ doped TeO2-ZnO glasses containing silver nanoparticles
- de Assumpcao, Thiago A. A.
- da Silva, Davinson M.
- Camilo, Mauricio E.
- Kassab, Luciana R. P.
- Gomes, Anderson S. L.
- de Araujo, Cid B.
- Wetter, Niklaus U.
DOIAbstract
Frequency upconversion (UC) properties of Tm3+ doped TeO2-ZnO glasses containing silver nanoparticles (NPs) were investigated. Infrared-to-visible and infrared-to-infrared UC processes associated to the Tm3+ ions were studied by exciting the samples with a cw 1050 nm ytterbium laser. The luminescence intensity as a function of laser intensity was also measured using a pulsed 1047 nm Nd3+:YVO laser in order to determine the number of photons participating in the UC processes. Enhancement of the UC signals for samples heat-treated during various time intervals is attributed to the growth of the local field in the vicinity of the NPs. PL enhancement by one-order of magnitude was observed in the whole spectrum of the samples heat-treated during...
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