Er3+-activated SiO2-based glasses and glass-ceramics: from structure to optimisation
| Autor: | Afify, N. D., Dalba, G., Rocca, F., Maurizio Ferrari |
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| Rok vydání: | 2007 |
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| Zdroj: | Physics and chemistry of glasses b48 (2007): 229–234. info:cnr-pdr/source/autori:N.D. Afify, G. Dalba, F. Rocca, and M. Ferrari/titolo:Er3+-activated SiO2-based glasses and glass-ceramics: from structure to optimisation/doi:/rivista:Physics and chemistry of glasses/anno:2007/pagina_da:229/pagina_a:234/intervallo_pagine:229–234/volume:b48 ResearcherID |
| Popis: | This paper describes and compares the local environments of Er3+ ions in pure SiO2, SiO2-Al2O3, SiO2-TiO2, and SiO2-HfO2 glasses, and in SiO2-HfO2 glass-ceramic waveguiding systems. This structural information is useful for selecting waveguides with optimised functional properties. This comparison has emphasised the peculiarity of the SiO2-HfO2 glass, in which the Er3+ ions are incorporated in HfO2-rich regions. By appropriate heat treatment, a transformation of SiO2-HfO2 system from glass to glass-ceramic occurs, where Er3+ remains incorporated in HfO2 nanocrystals as substituent of Hf4+. The spectroscopic interpretations are coherent with the present structural results. |
| Databáze: | OpenAIRE |
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