Blue cooperative luminescence properties in Yb3+ doped GeO2-PbO-Bi2O3 vitreous system for the production of thin films

dc.contributor.authorCacho, V. D.
dc.contributor.authorKassab, L. R. P.
dc.contributor.authorOliveira, S. L.
dc.contributor.authorMansano, R. D.
dc.contributor.authorVerdonck, P.
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:25:53Z
dc.date.available2014-05-20T15:25:53Z
dc.date.issued2006-10-25
dc.description.abstractGermanate glasses are of interest for optoelectronic applications because they combine high mechanical strength, high chemical durability and temperature stability with a large transmission window (400 to 4500 nm) and high refractive index (2.0). GeO2-PbO-Bi2O3 glasses doped with Y-b(3+) were fabricated by melting powders in a crucible and then pouring them in a brass mold. Energy Dispersive Spectroscopy showed that the glass composition has a high spatial uniformity and that the Yb concentration in the solid sample is proportional to the Yb concentration in the melt, what was confirmed by absorption measurements. Intense blue emission at 507 nm was observed, corresponding to half of the wavelength of the near infrared region (NIR) emission; besides, a decay lifetime of 0.25 ms was measured and this corresponds to half of the decay lifetime in the infrared region; these are very strong indications of the presence of blue cooperative luminescence. Larger targets have been produced to be sputtered, resulting in thin films for three dimensional (3D) display and waveguide applications. (c) 2006 Elsevier B.V. All rights reserved.en
dc.description.affiliationEPUSP, Dept Engn Sistemas Electron, São Paulo, Brazil
dc.description.affiliationUNESP, CETEPS, FATEC SP, Lab Vidros & Datacao, São Paulo, Brazil
dc.description.affiliationUSP, Inst Fis Sao Carlos, BR-13560970 Sao Carlos, SP, Brazil
dc.description.affiliationUnespUNESP, CETEPS, FATEC SP, Lab Vidros & Datacao, São Paulo, Brazil
dc.format.extent764-767
dc.identifierhttp://dx.doi.org/10.1016/j.tsf.2005.12.176
dc.identifier.citationThin Solid Films. Lausanne: Elsevier B.V. Sa, v. 515, n. 2, p. 764-767, 2006.
dc.identifier.doi10.1016/j.tsf.2005.12.176
dc.identifier.issn0040-6090
dc.identifier.urihttp://hdl.handle.net/11449/36210
dc.identifier.wosWOS:000241220600093
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofThin Solid Films
dc.relation.ispartofjcr1.939
dc.relation.ispartofsjr0,617
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectbulk glassespt
dc.subjectcooperative effectpt
dc.subjectgermanatept
dc.subjectrare-earthpt
dc.titleBlue cooperative luminescence properties in Yb3+ doped GeO2-PbO-Bi2O3 vitreous system for the production of thin filmsen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.

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