Spectroscopic properties of Nd3+-doped tungsten tellurite glasses

Autor(es)

Costa, F. B. ^[1] ; Yukimitu, K. ^[1] ; Nunes, L. A. O. ^[2] ; Figueiredo, M. S. ^[3] ; Andrade, L. H. C. ^[4] ; Lima, S. M. ^[4] ; Moraes, J. C. S. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Paulista, UNESP, Fac Engn, Pres Prudente, SP - Brazil

^[2] IFSC, Lab Laser & Aplicacoes, Sao Carlos, SP - Brazil

^[3] UFGD, Dourados, MS - Brazil

^[4] Univ Estadual Mato Grosso do Sul, Grp Espectroscopia Opt & Fototerm, Dourados, MS - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS; v. 88, p. 54-59, JAN 2016.
• Citações Web of Science: 12

Resumo

In this work, we investigate the spectroscopy properties of neodymium doped tungsten-tellurite glasses prepared in ambient and O-2-rich atmospheres. A conversion of TeO4 to TeO3 units was caused by the addition of Nd3+ into the glass, which was confirmed by absorption spectra and by Judd-Ofelt parameter behavior. The relaxation of the F-4(312) level is dominated by radiative decay and cross-relaxation between Nd3+ and Nd3+ ions. The energy transfer from Nd3+ to the hydroxyl group is negligible when compared to the cross-relaxation. The luminescence quantum efficiency values of the F-4(3/2) level decreases as the Nd3+ concentration increases, independently if determined by the Judd-Ofelt method or by the thermal lens technique. The observed reduction in the IR absorption associated to OH groups was not effective to improve the luminescence quantum efficiency. (C) 2015 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 13/19747-9 - Investigação de propriedades espectroscópicas em vidros telúritos livres de OH-
• Beneficiário: João Carlos Silos Moraes
• Modalidade de apoio: Auxílio à Pesquisa - Regular