1. Spectroscopic properties of Nd3+-doped tungsten-tellurite glasses
- Author
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L.A.O. Nunes, Francine Bettio Costa, João Carlos Silos Moraes, Luis Humberto da Cunha Andrade, M. S. Figueiredo, Sandro Marcio Lima, K. Yukimitu, Universidade Estadual Paulista (Unesp), Laboratório de Laser e Aplicações, IFSC, UFGD, and Universidade Estadual de Mato Grosso do Sul (UEMS)
- Subjects
Materials science ,Luminescence ,Absorption spectroscopy ,Analytical chemistry ,chemistry.chemical_element ,VIDRO ,02 engineering and technology ,Tungsten ,01 natural sciences ,Neodymium ,0103 physical sciences ,General Materials Science ,Spectroscopy ,010302 applied physics ,Optical properties ,Glasses ,Doping ,Relaxation (NMR) ,General Chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,chemistry ,Optical materials ,Quantum efficiency ,0210 nano-technology - Abstract
Made available in DSpace on 2018-12-11T16:39:42Z (GMT). No. of bitstreams: 0 Previous issue date: 2015-09-25 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) In this work, we investigate the spectroscopy properties of neodymium doped tungsten-tellurite glasses prepared in ambient and O2-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 4F3/2 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 4F3/2 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. Faculdade de Engenharia, UNESP - Univ Estadual Paulista, Campus de Ilha Solteira Laboratório de Laser e Aplicações, IFSC UFGD Grupo de Espectroscopia Óptica e Fototérmica, UEMS Faculdade de Engenharia, UNESP - Univ Estadual Paulista, Campus de Ilha Solteira CAPES: 042/2010 CNPq: 305063/2012-0 CNPq: 445286/2014-8
- Published
- 2015