Intense red upconversion emission in infrared excited holmium-doped PbGeO3-PbF2-CdF2 transparent glass ceramic

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorGouveia-Neto, A. S.
dc.creatorda Costa, E. B.
dc.creatorBueno, L. A.
dc.creatorRibeiro, SJL
dc.date2014-05-20T15:22:47Z
dc.date2016-10-25T17:56:34Z
dc.date2014-05-20T15:22:47Z
dc.date2016-10-25T17:56:34Z
dc.date2004-10-01
dc.date.accessioned2017-04-05T23:38:37Z
dc.date.available2017-04-05T23:38:37Z
dc.identifierJournal of Luminescence. Amsterdam: Elsevier B.V., v. 110, n. 1-2, p. 79-84, 2004.
dc.identifier0022-2313
dc.identifierhttp://hdl.handle.net/11449/33713
dc.identifierhttp://acervodigital.unesp.br/handle/11449/33713
dc.identifier10.1016/j.jlumin.2004.04.005
dc.identifierWOS:000223874800008
dc.identifierhttp://dx.doi.org/10.1016/j.jlumin.2004.04.005
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/877776
dc.descriptionIntense red upconversion emission around 650 nm in PbGeO3-PbF2-CdF2 transparent glass ceramic containing beta-PbF2:Ho3+ nanocrystals, is presented. The holmium-doped vitroceramic samples were excited by a 980 nm diode laser source. The 650 nm upconversion signal was assigned to the F-5(5) --> I-5(8) transition of holmium ions. Very low intensity signals around 490 and 540 nm corresponding to the F-5(2,3) --> I-5(8) and S-4(2), F-5(4) --> I-5(8) transitions, respectively, were also detected. The upconversion excitation mechanism was achieved through a combination of stepwise phonon-assisted multiphoton absorption, cross-relaxation processes involving pairs of holmium ions, and excited-state absorption. Using a diode laser pump source around 850 nm green upconversion emission around 540 nm was the observed predominant signal. (C) 2004 Elsevier B.V. All rights reserved.
dc.languageeng
dc.publisherElsevier B.V.
dc.relationJournal of Luminescence
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectvitroceramic
dc.subjectholmium
dc.subjectupconversion
dc.subjectluminescence
dc.subjectenergy-transfer
dc.titleIntense red upconversion emission in infrared excited holmium-doped PbGeO3-PbF2-CdF2 transparent glass ceramic
dc.typeOtro


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