Liquid phase epitaxy growth and visible emission of Tb3+,Gd3+:LiYF4 layers - Archive ouverte HAL
Article Dans Une Revue Optical Materials Express Année : 2023

Liquid phase epitaxy growth and visible emission of Tb3+,Gd3+:LiYF4 layers

Résumé

Single-crystalline layers of 12 at.% Tb3+, 5 at.% Gd3+:LiYF4 were grown by the liquid phase epitaxy method on (001) oriented bulk undoped LiYF4 substrates using LiF as a solvent. The growth temperature was 737-740°C, the growth duration was 15-25 min, and the layer thickness was 40-90 µm. The structural, morphological, vibronic and spectroscopic properties of the layers were studied. Tb3+ ions were uniformly distributed in the layers with no diffusion into the substrate. Polarized Raman spectroscopy confirmed the orientation of the layers (growth along the [001] direction). Under excitation in the blue, the layers exhibited intense green emission. For the 5D4→7F5 Tb3+ transition, the peak stimulated-emission cross-section is 1.28×10−21 cm² at 542.0 nm for π-polarization. The luminescence lifetime of the 5D4 Tb3+ state is 5.05 ms at room temperature. The crystal-field splitting of Tb3+ multiplets was determined at low temperature. The developed epitaxies are promising for green and yellow waveguide lasers.
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Dates et versions

hal-04208915 , version 1 (15-09-2023)

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Amandine Baillard, Gurvan Brasse, Pavel Loiko, Rosa Maria Solé, Magdalena Aguiló, et al.. Liquid phase epitaxy growth and visible emission of Tb3+,Gd3+:LiYF4 layers. Optical Materials Express, 2023, 13 (8), pp.2355-2368. ⟨10.1364/ome.491569⟩. ⟨hal-04208915⟩
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