A systematic interpretation of the quantum cutting effect by a cooperative energy transfer mechanism in Te4+/Yb3+ co-doped tellurite glasses

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dc.contributor.authorRufino Souza, Ana Kely
dc.contributor.authorSilva, Junior Reis
dc.contributor.authorCosta, Francine Bettio [UNESP]
dc.contributor.authorSilos Moraes, Joao Carlos [UNESP]
dc.contributor.authorOliveira Nunes, Luiz Antonio de
dc.contributor.authorCunha Andrade, Luis Humberto da
dc.contributor.authorLima, Sandro Marcio
dc.contributor.institutionUniversidade Estadual de Mato Grosso do Sul (UEMS)
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2023-07-29T16:09:19Z
dc.date.available2023-07-29T16:09:19Z
dc.date.issued2023-06-01
dc.description.abstractThe near-infrared downconversion (DC) mechanism in Te4+/Yb3+ co-doped 75TeO2–25Li2O tellurite glasses (amounts in mol%) was closely followed using optical and thermal spectroscopy techniques. The glasses were prepared by the conventional melt-quenching method, with a melting temperature of 800 °C, in an ambient atmosphere, which were the best synthesis conditions for observing Te4+ in the glass. The results indicated that excitation in the ultraviolet region led to an intense emission of two NIR photons (at around 978 nm) in the co-doped tellurite glasses. This effect revealed the occurrence of a cooperative energy transfer (CET) mechanism in the system, where a Te4+ ion was responsible for the excitation of two Yb3+ ions. The CET efficiency (ηCET) was calculated from the Te4+ lifetime, obtaining a maximum of 74% for the tellurite glass prepared with the highest Yb3+ concentration. The use of thermal lens spectroscopy confirmed the quantum cutting effect, by observing the dependence of the thermal properties of the glass on the Yb3+ concentration. A maximum DC efficiency of 137% was measured for the sample with 4 mol% of Yb3+.en
dc.description.affiliationPrograma de Pós-Graduação em Recursos Naturais Universidade Estadual de Mato Grosso do Sul, MS
dc.description.affiliationUniversidade Estadual Paulista (UNESP) Faculdade de Engenharia, SP
dc.description.affiliationInstituto de Física de São Carlos Universidade de São Paulo, SP
dc.description.affiliationUnespUniversidade Estadual Paulista (UNESP) Faculdade de Engenharia, SP
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipFundação de Apoio ao Desenvolvimento do Ensino, Ciência e Tecnologia do Estado de Mato Grosso do Sul
dc.format.extent19470-19480
dc.identifierhttp://dx.doi.org/10.1016/j.ceramint.2023.03.079
dc.identifier.citationCeramics International, v. 49, n. 11, p. 19470-19480, 2023.
dc.identifier.doi10.1016/j.ceramint.2023.03.079
dc.identifier.issn0272-8842
dc.identifier.scopus2-s2.0-85150851381
dc.identifier.urihttp://hdl.handle.net/11449/249793
dc.language.isoeng
dc.relation.ispartofCeramics International
dc.sourceScopus
dc.subjectCooperative energy transfer
dc.subjectDownconversion
dc.subjectFluorescence quantum efficiency
dc.subjectQuantum cutting
dc.subjectTe4+ ion
dc.subjectTellurite glass
dc.subjectThermal lens spectroscopy
dc.subjectYb3+ ion
dc.titleA systematic interpretation of the quantum cutting effect by a cooperative energy transfer mechanism in Te4+/Yb3+ co-doped tellurite glassesen
dc.typeArtigo
unesp.author.orcid0000-0002-6520-3664[1]
unesp.author.orcid0000-0002-2644-4801[6]
unesp.author.orcid0000-0002-3270-6628[7]
unesp.departmentFísica e Química - FEISpt

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Ilha Solteira - FEIS - Faculdade de Engenharia