Phase-dependent emission of KLaF4:Nd3+ nanocrystals in oxyfluoride glass-ceramics

A. A. Cabral; G. Gorni; J. J. Velázquez; M. J. Pascual; A. Durán; J. Fernández; R. Balda

doi:10.1117/12.2507266

27 February 2019 Phase-dependent emission of KLaF₄:Nd³⁺ nanocrystals in oxyfluoride glass-ceramics

A. A. Cabral, G. Gorni, J. J. Velázquez, M. J. Pascual, A. Durán, J. Fernández, R. Balda

Proceedings Volume 10914, Optical Components and Materials XVI; 109140S (2019) https://doi.org/10.1117/12.2507266
Event: SPIE OPTO, 2019, San Francisco, California, United States

Abstract

Transparent oxyfluoride glass-ceramics obtained by the adequate heat treatment of Nd³⁺-doped glass with composition 70SiO₂–7Al₂O₃–16K₂O–7LaF₃ (mol%) are investigated. Site-selective laser spectroscopy demonstrates that depending on the Nd³⁺ concentration, cubic (α-phase) and hexagonal (β-phase) KLaF₄ nanocrystals precipitate from the starting glass. The presence of both crystalline phases are unambiguously identified from the emission and excitation spectra and lifetime measurements of the ⁴F_3/2 state of Nd³⁺ ions. The spectroscopic results are in agreement with those obtained with XRD and HR-TEM techniques: α-KLaF₄ nanocrystals are found to be present for all NdF3 concentrations whereas β-KLaF₄ nanocrystals are predominant in the GC samples doped with 0.5 mol%.

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A. A. Cabral, G. Gorni, J. J. Velázquez, M. J. Pascual, A. Durán, J. Fernández, and R. Balda "Phase-dependent emission of KLaF₄:Nd³⁺ nanocrystals in oxyfluoride glass-ceramics", Proc. SPIE 10914, Optical Components and Materials XVI, 109140S (27 February 2019); https://doi.org/10.1117/12.2507266

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