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dc.contributor.authorBorrero-González, L. J.-
dc.contributor.authorGalleani, G.-
dc.contributor.authorManzani, D.-
dc.contributor.authorNunes, L. A O-
dc.contributor.authorRibeiro, Sidney José Lima-
dc.identifier.citationOptical Materials, v. 35, n. 12, p. 2085-2089, 2013.-
dc.description.abstractProcesses 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+:3P0 → 3H4 (482 nm), Pr3+:1D2 → 3H6 (800 nm), Yb3+:2F5/2 → 2F 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+:3P0 → 1G4; Yb3+:2F7/2 → 2F5/2) resulting in one photon emitted by Pr3+ (1G4 → 3H5) and one photon emitted by Yb3+ (2F7/2 → 2F5/2); 2-a resonant two-step first order energy transfer, where the first part of energy is transferred to Yb3+ neighbor through cross relaxation (Pr3+:3P0 → 1G4; Yb3+:2F7/2 → 2F5/2) followed by a second energy transfer step (Pr 3+:1G4 → 3H4; Yb3+:2F7/2 → 2F5/2). A third process leading to one IR photon emission to each visible photon absorbed involves cross relaxation energy transfer (Pr3+: 1D2 → 3F4; Yb 3+:2F7/2 → 2F5/2). © 2013 Elsevier B.V. All rights reserved.en
dc.subjectFluoroindate glasses Frequency down-conversion Lanthanides Energy transfer-
dc.titleVisible to infrared energy conversion in Pr3+-Yb3+ co-doped fluoroindate glassesen
dc.contributor.institutionUniversidade de São Paulo (USP)-
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.description.affiliationInstituto de Física de São Carlos Universidade de São Paulo, CP 369, São Carlos, SP 13560-970-
dc.description.affiliationInstitute of Chemistry São Paulo State Univ - UNESP, CP 355, Araraquara, SP 14801-970-
dc.description.affiliationUnespInstitute of Chemistry São Paulo State Univ - UNESP, CP 355, Araraquara, SP 14801-970-
dc.rights.accessRightsAcesso restrito-
dc.relation.ispartofOptical Materials-
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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