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Titania-based organic-inorganic hybrid planar waveguides

dc.contributor.authorNassar, E. J.
dc.contributor.authorGoncalves, R. R.
dc.contributor.authorFerrari, M.
dc.contributor.authorMessaddeq, Younes [UNESP]
dc.contributor.authorRibeiro, SJL
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniv Franca
dc.contributor.institutionUniv Trent
dc.contributor.institutionCNR
dc.date.accessioned2014-05-20T15:29:38Z
dc.date.available2014-05-20T15:29:38Z
dc.date.issued2002-10-07
dc.description.abstractEu3+ -doped titania-silica planar waveguides were prepared from tetraethylorthotitanate (TEOT) and modified silane 3-amino-propyltriethoxysilane (APTS). Films were deposited on borosilicate glass substrates by a dip-coating technique. The refractive index, the thickness and the total attenuation coefficient of the waveguides were measured at 632.8 and 1550 nm by prism coupling technique. Starting from pure titania films, the addition of modified silane leads to a decrease in the refractive index and an increase in thickness. Squared electric field simulation has shown that the light confinement in the waveguide increases with the silane content of the so]. Emission spectra present a broad emission band due to the modified silane and EU emission transitions arising mainly from the D-5(0) level to the F-7(J) (J = 0-4) manifolds. The dependence of transition intensities and excited state lifetimes on the initial composition and also on the heat treatment performed was interpreted in terms of structural changes occurring during the preparation process. (C) 2002 Elsevier B.V. B.V. All rights reserved.en
dc.description.affiliationUNESP, Inst Chem, BR-14801970 Araraquara, SP, Brazil
dc.description.affiliationUniv Franca, BR-14404600 Franca, SP, Brazil
dc.description.affiliationUniv Trent, Dipartimento Ingn Mat, I-38100 Trent, Italy
dc.description.affiliationUniv Trent, INFM, I-38100 Trent, Italy
dc.description.affiliationCNR, CeFSA, Ctr Fis Stati Aggregati, I-38050 Trent, Italy
dc.description.affiliationUnespUNESP, Inst Chem, BR-14801970 Araraquara, SP, Brazil
dc.format.extent221-225
dc.identifierhttp://dx.doi.org/10.1016/S0925-8388(02)00345-6
dc.identifier.citationJournal of Alloys and Compounds. Lausanne: Elsevier B.V. Sa, v. 344, n. 1-2, p. 221-225, 2002.
dc.identifier.doi10.1016/S0925-8388(02)00345-6
dc.identifier.issn0925-8388
dc.identifier.lattes2998503841917815
dc.identifier.lattes6446047463034654
dc.identifier.urihttp://hdl.handle.net/11449/39174
dc.identifier.wosWOS:000178852200050
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofJournal of Alloys and Compounds
dc.relation.ispartofjcr3.779
dc.relation.ispartofsjr1,020
dc.rights.accessRightsAcesso restritopt
dc.sourceWeb of Science
dc.subjectsol-gelpt
dc.subjecteuropium(III)pt
dc.subjectluminescencept
dc.subjectthin filmspt
dc.subjectplanar waveguidespt
dc.titleTitania-based organic-inorganic hybrid planar waveguidesen
dc.typeArtigopt
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
dspace.entity.typePublication
relation.isOrgUnitOfPublicationbc74a1ce-4c4c-4dad-8378-83962d76c4fd
relation.isOrgUnitOfPublication.latestForDiscoverybc74a1ce-4c4c-4dad-8378-83962d76c4fd
unesp.author.lattes2998503841917815
unesp.author.lattes6446047463034654
unesp.campusUniversidade Estadual Paulista (UNESP), Instituto de Química, Araraquarapt
unesp.departmentQuímica Inorgânica - IQARpt

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