Autor(es)

Silva, O. B. ^{[1, 2]} ; Rivera, V. A. G. ^[3] ; Ledemi, Y. ^[4] ; Messaddeq, Y. ^[4] ; Marega Jr, E.

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13560970 Sao Carlos, SP - Brazil

^[2] Univ Estadual Piaui, Campus Prof Antonio Giovani Alves de Sousa, Piripiri, PI - Brazil

^[3] Univ Nacl Mayor San Marcos, Fac Ciencias Fis, Lima - Peru

^[4] Univ Laval, Ctr Opt Photon & Laser, Quebec City, PQ G1V 0A6 - Canada

• Tipo de documento: Artigo Científico
• Fonte: Journal of Luminescence; v. 232, APR 2021.
• Citações Web of Science: 3

Resumo

The influence of different Germanium dioxide concentration on the structural, thermal, optical and spectroscopic properties of Er3+ doped tellurite glasses was carefully investigated. The glasses were prepared by meltquenching technique. The samples were characterized by UV-visible-near-infrared spectroscopy, downshift emission spectroscopy, Raman spectroscopy, lifetime of green emission and up-conversion under near-infrared laser diode excitation at 975 nm. The Judd-Ofelt analysis was performed based on the absorption spectra of the glasses in order to obtain the Judd-Ofelt parameters (Omega(lambda)), radiative transition rates, radiative lifetimes and quantum efficiency. The solubility of Er3+ into the host vitreous matrix, the enhancement in the luminescence intensity and improvement in the thermal stability (>= 100 degrees C) of the glasses was verified on introducing GeO2. (AU)

• Processo FAPESP: 13/07276-1 - CEPOF - Centro de Pesquisa em Óptica e Fotônica
• Beneficiário: Vanderlei Salvador Bagnato
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs