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Optical properties of tellurite glasses elaborated within the TeO2-Tl2O-Ag2O and TeO2-ZnO-Ag2O ternary systems

hal.structure.identifierAxe 3 : organisation structurale multiéchelle des matériaux [SPCTS-AXE3]
hal.structure.identifierLaboratoire de sciences des matériaux et de l’environnement [Université de Sfax] [SME]
dc.contributor.authorLINDA, D.
hal.structure.identifierAxe 3 : organisation structurale multiéchelle des matériaux [SPCTS-AXE3]
dc.contributor.authorDUCLERE, Jean-René
hal.structure.identifierDepartment of Frontier Materials [Nagoya]
dc.contributor.authorHAYAKAWA, T.
hal.structure.identifierAxe 3 : organisation structurale multiéchelle des matériaux [SPCTS-AXE3]
dc.contributor.authorCOLAS, Maggy
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorCARDINAL, Thierry
hal.structure.identifierAxe 3 : organisation structurale multiéchelle des matériaux [SPCTS-AXE3]
dc.contributor.authorMIRGORODSKI, Andrei
hal.structure.identifierLaboratoire de sciences des matériaux et de l’environnement [Université de Sfax] [SME]
dc.contributor.authorKABADOU, A.
hal.structure.identifierAxe 3 : organisation structurale multiéchelle des matériaux [SPCTS-AXE3]
dc.contributor.authorTHOMAS, Philippe
dc.date.issued2013
dc.identifier.issn0925-8388
dc.description.abstractEnThe optical properties of glasses elaborated within the TeO2-Tl2O-Ag2O and TeO2-ZnO-Ag2O ternary systems are presented. The paper is articulated in two parts. The first part concerns the TeO2-Tl2O-Ag2O system, where the linear refractive index, the absorption coefficient and the optical band gap are measured as a function of the Ag2O content. From ellipsometry measurements, it is noticed that the linear refractive index n0 remains constant up to 5 mol% in AgO0.5 and then slightly increases at higher concentrations (10 mol%). Such evolution of the refractive index was related to the higher electronic polarizability of Ag+ cations compared to that of Te4+ cations, assuming that the electronic polarizability of O2 anions remains constant. The reduction in the optical band gap value is attributed for some part to the higher quantity of non-bridging oxygen atoms induced by the depolymerization of the glass. The third order non-linear optical properties (c and Re(v(3)) values) of these TeO2-Tl2O-Ag2O glasses are then extracted from Z-scan measurements. For glass compositions ranging from 0 to 10 mol% in AgO0.5, the Re(v(3)) value shifts from roughly 60 to more than 80 times that of silica, which testify to the excellent non-linear optical properties of such TeO2-Tl2O glasses containing silver (tellurite glasses possess intrinsic high optical non-linearity). The addition of Tl2O induces the depolymerization of the glass framework but, on the other hand, helps to maintain the amplitude of the optical non-linearity, through the presence of highly polarizable Tl-based entities. Here, below 5 mol% in AgO0.5, it is believed that the activity of the electronic lone pair of Tl+ ions is inhibited. Over this limit, such lone pair would become active, explaining the clear increase of the Re(v(3)) value. Finally, the second part of the paper is devoted to the study of photoluminescence properties of new TeO2-ZnO-Ag2O glasses. Indeed, probably due to the creation of Ag+-Tl+ pairs, there is absolutely no photoluminescence detected for glasses elaborated in the TeO2-Tl2O-Ag2O system. At the opposite, the temperature dependent photoluminescence properties of TeO2-ZnO-Ag2O glasses are reported. Under UV-visible excitation at 385 nm, the samples emit orange light, with a broad emission wavelength peaking around 580-585 nm. The nature of the light emitting centers is discussed and two main hypotheses are debated: the creation of Ag+-Ag+ or Ag+-Zn2+ pairs, with stronger arguments more in favor of the last one.
dc.language.isoen
dc.publisherElsevier
dc.subject.enLuminescence
dc.subject.enTellurite glasses
dc.subject.enNon-linear optical properties
dc.subject.enSilver doping
dc.title.enOptical properties of tellurite glasses elaborated within the TeO2-Tl2O-Ag2O and TeO2-ZnO-Ag2O ternary systems
dc.typeArticle de revue
dc.identifier.doi10.1016/j.jallcom.2013.01.172
dc.subject.halChimie/Matériaux
bordeaux.journalJournal of Alloys and Compounds
bordeaux.page151-160
bordeaux.volume561
bordeaux.peerReviewedoui
hal.identifierhal-00907485
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00907485v1
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