Visible to infrared energy conversion in Pr3+-Yb3+ co-doped fluoroindate glasses

L. J. Borrero-González, G. Galleani, D. Manzani, L. A.O. Nunes, S. J.L. Ribeiro

Producción científica: Contribución a una revistaArtículorevisión exhaustiva

31 Citas (Scopus)

Resumen

Processes involving visible to infrared energy conversion are presented for Pr3+-Yb3+ co-doped fluoroindate glasses. The emission in the visible and infrared regions, the luminescence decay time of the Pr 3+:3P03H4 (482 nm), Pr3+:1D23H6 (800 nm), Yb3+:2F5/22F 7/2 (1044 nm) transitions and the photoluminescence excitation spectra were measured in Pr3+ samples and in Pr3+-Yb 3+ samples as a function of the Yb3+ concentration. In addition, energy transfer efficiencies were estimated from Pr3+: 3P0 and Pr3+:1D2 levels to Yb3+:2F7/2 level. Down-Conversion (DC) emission is observed due to a combination of two different processes: 1-a one-step cross relaxation (Pr3+:3P01G4; Yb3+:2F7/22F5/2) resulting in one photon emitted by Pr3+ (1G43H5) and one photon emitted by Yb3+ (2F7/22F5/2); 2-a resonant two-step first order energy transfer, where the first part of energy is transferred to Yb3+ neighbor through cross relaxation (Pr3+:3P01G4; Yb3+:2F7/22F5/2) followed by a second energy transfer step (Pr 3+:1G43H4; Yb3+:2F7/22F5/2). A third process leading to one IR photon emission to each visible photon absorbed involves cross relaxation energy transfer (Pr3+: 1D23F4; Yb 3+:2F7/22F5/2).

Idioma originalInglés
Páginas (desde-hasta)2085-2089
Número de páginas5
PublicaciónOptical Materials
Volumen35
N.º12
DOI
EstadoPublicada - oct. 2013
Publicado de forma externa

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