Abstract
Photo-induced changes in GeO2 glass have been studied in terms of its optical and structural properties. Band-gap excitation gives rise to modifications in mid-gap optical absorption and photo-luminescence spectra. It also produces electron-spin signals at g ≃ 1.995 and 2.008. Raman-scattering spectrum becomes sharper, X-ray diffraction patterns show a disappearance of a crystalline peak, and the illuminated surfaces expand. These observations can be accounted for by assuming bond transformations from rutile-like to defective quartz-like structures and/or from small to large rings. These photo-induced changes in GeO2 are discussed in comparison with those in SiO2 and GeS2.
Original language | English |
---|---|
Pages (from-to) | 3815-3822 |
Number of pages | 8 |
Journal | Journal of Non-Crystalline Solids |
Volume | 352 |
Issue number | 36-37 |
DOIs | |
Publication status | Published - 2006 Oct 1 |
Keywords
- Absorption
- Chalcogenides
- Defects
- Electron spin resonance
- Germania
- Glasses
- Laser-matter interactions
- Luminescence
- Optical spectroscopy
- Photo-induced effects
- Radiation effects
- Raman spectroscopy
- Raman-scattering
- Silica
- X-ray diffraction
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Condensed Matter Physics
- Materials Chemistry