Heavy metal oxide glass-ceramics containing luminescent gallium-garnets single crystals for photonic applications

Autor(es)

Souza, A. E. ^[1] ; Antonio, S. G. ^[1] ; Ribeiro, S. J. L. ^[1] ; Franco, D. F. ^[1] ; Galeani, G. ^[2] ; Cardinal, T. ^[3] ; Dussauze, M. ^[4] ; Nalin, M. ^[1]

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ, Inst Chem, UNESP, Rua Prof Francisco Degni 55, BR-14800060 Araraquara, SP - Brazil

^[2] Univ Sao Paulo, Sao Carlos Inst Phys, Sao Carlos, SP - Brazil

^[3] Univ Bordeaux, ICMCB, CNRS, UPR 9048, Pessac - France

^[4] Univ Bordeaux, ISM, CNRS, UPR 5803, Pessac - France

• Tipo de documento: Artigo Científico
• Fonte: Journal of Alloys and Compounds; v. 864, MAY 25 2021.
• Citações Web of Science: 0

Resumo

Glass-ceramics containing rare earth gallium garnets were obtained using glass compositions as reactional medium. This work reports on the synthesis, and structural, morphological, and optical characterizations of Er3+ and Tm3+-doped Yb3Ga5O12 crystals prepared from controlled cooling of heavy metal oxide glass melts. Micrometric cubic crystals were obtained by controlling the cooling of a rare earth-supersaturated glassy composition melted at high temperature. Crystals with sizes ranging between 5 and 150 mu m were formed into the glass matrix. A gallium garnet phase corresponding to space group Ia-3d was identified by X-ray diffraction and confirmed by Rietveld simulations. The morphology of crystals was studied by optical and scanning electron microscopies, while chemical elements were mapped by electron dispersive X-Ray spectroscopy. The glass phase was studied by XRD, thermal analysis and Raman spectroscopy. The optical properties of both glass and glass-ceramic materials were evaluated by UV-Vis and luminescence spectroscopies. Micro-luminescence measurements confirmed that rare earths were incorporated into the crystalline phase. Intense upconversion emissions of Er3+ (550 and 660 nm) and Tm3+ (800 nm) were observed when the glass-ceramics were pumped at 980 nm. These new glass-ceramics are excellent candidates for the development of photonic devices. (C) 2021 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 13/07793-6 - CEPIV - Centro de Ensino, Pesquisa e Inovação em Vidros
• Beneficiário: Edgar Dutra Zanotto
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs
• Processo FAPESP: 19/01223-0 - Estudo das propriedades ópticas e magnéticas de vidros óxidos de metais pesados e suas aplicações em impressão 3D
• Beneficiário: Marcelo Nalin
• Modalidade de apoio: Bolsas no Exterior - Pesquisa