Structural and optical properties of Eu 3+ doped Y 2 O 3 nanostructures embedded in amorphous alumina waveguides prepared by pulsed laser deposition - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Physics: Condensed Matter Année : 2006

Structural and optical properties of Eu 3+ doped Y 2 O 3 nanostructures embedded in amorphous alumina waveguides prepared by pulsed laser deposition

Résumé

Composite optical waveguides of Eu doped Y2O3 nanolayers with various theoretical thicknesses from 10 to 0.2 nm embedded in an amorphous alumina matrix were prepared by targeted alternating pulsed laser ablation. Their structural and fluorescence properties were compared to those of thick nanocrystallized Eu:Y2O3 films deposited under the same conditions. Whereas layers with thicknesses of 5 and 10 nm are continuous and crystalline, layers with thickness of less than 2 nm are constituted of isolated amorphous nanoparticles with a mean height of around 1 nm, according to transmission electron microscopy and atomic force microscopy. The Eu3+ fluorescence properties show that Eu3+ ions are localized in different sites inside the nanolayers or nanoparticles or at the interface with the matrix, depending on the size of the nanostructure. The refractive index of the composite waveguides was measured by m-line spectroscopy. Waveguiding propagation was observed.
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hal-04552811 , version 1 (19-04-2024)

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A Pillonnet, J Lancok, C. Martinet, O Marty, J Bellessa, et al.. Structural and optical properties of Eu 3+ doped Y 2 O 3 nanostructures embedded in amorphous alumina waveguides prepared by pulsed laser deposition. Journal of Physics: Condensed Matter, 2006, 18 (44), pp.10043-10058. ⟨10.1088/0953-8984/18/44/005⟩. ⟨hal-04552811⟩
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