Local structure of Yb3+ ions and X-ray induced defect in Yb-doped silica glass

The local structure of Yb3+ ions in Yb-doped silica glass was investigated by extended X-ray absorption fine structure, the Rayleigh scattering and optical absorption measurements. It was found that the Yb coordination number increases from 3 to 4.5 with increasing Yb concentration. Simultaneously,...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 2018-11, Vol.58 (1)
Main Authors: Okazaki, T., Sekiya, E. H., Saito, K.
Format: Article
Language:English
Online Access:Get full text
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Summary:The local structure of Yb3+ ions in Yb-doped silica glass was investigated by extended X-ray absorption fine structure, the Rayleigh scattering and optical absorption measurements. It was found that the Yb coordination number increases from 3 to 4.5 with increasing Yb concentration. Simultaneously, the absorption cross-section of Yb3+ ion decreases and the Rayleigh scattering coefficient increases. These results suggest that local structure observed in Yb2O3 or Yb2Si2O7 crystals appears in high-Yb samples. Furthermore, photodarkening by X-ray irradiation was measured, and the correlation to the local structure change was clarified.
ISSN:0021-4922
1347-4065
DOI:10.7567/1347-4065/aae89d