Optically active oxygen-deficiency-related centers in amorphous silicon dioxide
- 作者：Skuja ; Linards
- 关键词：D110 ; S160
- 刊名：Journal of Non-Crystalline Solids
- 出版年：1998
- 期刊代码：50_00223093
- 类别：ms
- 出版时间：October 1, 1998
- 卷：239
- 期：1-3
- 页码：16-48
- 文件大小：608 K
摘要
The spectroscopic properties, structure and interconversions of optically active oxygen-deficiency-related point defects in vitreous silica are reviewed. These defects, the E′-centers (oxygen vacancies with a trapped hole or 3-fold-coordinated silicons), different variants of diamagnetic ‘ODCs' (oxygen-deficiency centers), and their Ge-related analogs play a key role in the fiber-optic Bragg grating writing processes. The controversy surrounding the structural models for the Si- and Ge-related ODCs is discussed and the similarity between the bulk and surface point defects in silica is emphasized. The possible interconversion mechanisms between 2-fold-coordinated Si, neutral oxygen vacancies and E′-centers are discussed. The effects of glassy disorder have a profound effect on defect properties and interconversion processes in silica.