13 April 2000 Structural properties of erbium-activated silica-titania glasses: modeling by molecular dynamics method
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Proceedings Volume 3942, Rare-Earth-Doped Materials and Devices IV; (2000) https://doi.org/10.1117/12.382864
Event: Symposium on Integrated Optoelectronics, 2000, San Jose, CA, United States
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.
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Stephane Chaussedent, Stephane Chaussedent, Christope Bernard, Christope Bernard, Andre Monteil, Andre Monteil, Nathalie Balu, Nathalie Balu, Jacques Obriot, Jacques Obriot, Sabina Ronchin, Sabina Ronchin, Cristiana Tosello, Cristiana Tosello, Maurizio Ferrari, Maurizio Ferrari, } "Structural properties of erbium-activated silica-titania glasses: modeling by molecular dynamics method", Proc. SPIE 3942, Rare-Earth-Doped Materials and Devices IV, (13 April 2000); doi: 10.1117/12.382864; https://doi.org/10.1117/12.382864

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