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Proceedings Paper

Structural properties of erbium-activated silica-titania glasses: modeling by molecular dynamics method
Author(s): Stephane Chaussedent; Christope Bernard; Andre Monteil; Nathalie Balu; Jacques Obriot; Sabina Ronchin; Cristiana Tosello; Maurizio Ferrari
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Paper Abstract

Here, we use molecular dynamics simulation to reconstruct a silica-titania glass with a Ti/Si atomic ratio of 8.5% activated by 0.7 at% of erbium. These quantities are chosen because they give both refractive index and optically ions concentration suitable for applications. We use a modified Born-Mayer-Huggins potential taking into account a three- body interaction. The distribution of TiO4 and SiO4 units as well as the bridging to non-bridging oxygen ratios are evaluated. The local environment of rare-earth ions is also analyzed. In particular, the clustering of erbium is discussed. From the simulated structure, the crystal-field strength is computed and discussed according to the Er3+ local environment. Finally, results are compared with information obtained by Raman and photoluminescence spectra.

Paper Details

Date Published: 13 April 2000
PDF: 10 pages
Proc. SPIE 3942, Rare-Earth-Doped Materials and Devices IV, (13 April 2000); doi: 10.1117/12.382864
Show Author Affiliations
Stephane Chaussedent, Univ. d'Angers (France)
Christope Bernard, Univ. d'Angers (France)
Andre Monteil, Univ. d'Angers (France)
Nathalie Balu, Univ. d'Angers (France)
Jacques Obriot, Univ. d'Angers (France)
Sabina Ronchin, Univ. degli Studi di Trento (Italy)
Cristiana Tosello, Univ. degli Studi di Trento (Italy)
Maurizio Ferrari, Ctr. Fisica Stati Aggregati (Italy)


Published in SPIE Proceedings Vol. 3942:
Rare-Earth-Doped Materials and Devices IV
Shibin Jiang, Editor(s)

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