Transcription of Section 1. Defect studies in vitreous silica and …
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Section 1. Defect studies in vitreous silica and …
Section 1. Defect studies in vitreous silica and related materialsOptically active oxygen -de ciency- related centers inamorphous silicon dioxideLinards Skuja*Institute of Solid State Physics, University of Latvia, 8 Kengaraga Str., LV-1063 Riga, LatviaAbstractThe spectroscopic properties, structure and interconversions of optically active oxygen -de ciency- related point de-fects in vitreous silica are reviewed. These defects, the E0-centers ( oxygen vacancies with a trapped hole or 3-fold-co-ordinated silicons), di erent variants of diamagnetic `ODCs' ( oxygen -de ciency centers), and their Ge- related analogsplay a key role in the ber-optic Bragg grating writing processes. The controversy surrounding the structural models forthe Si- and Ge- related ODCs is discussed and the similarity between the bulk and surface point defects in silica isemphasized. The possible interconversion mechanisms between 2-fold-coordinated Si, neutral oxygen vacancies and E0-centers are discussed.
Section 1. Defect studies in vitreous silica and related materials Optically active oxygen-deficiency-related centers in amorphous silicon dioxide
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