Résumé
Time-resolved luminescence spectroscopy has been widely used in studies of electronic excitations and their dynamics in insulators. Present paper discusses the potential of vacuum ultraviolet spectroscopy applied for wide band gap crystals using classical synchrotron radiation as well as more recently developed pulsed femtosecond short-wavelength light sources. Optical spectroscopy using novel free electron lasers and laser systems based on higher harmonic generation process allow detailed investigation of the interaction between electronic excitations and behaviour of solids under extreme radiation conditions. Significant changes in the quantum yield and emission decay kinetics as well as surface damage of single crystals were observed for CdWO4 and CaWO4 crystals studied in the temperature range of 8-300 K. However, in the range of excitation densities applied, up to ∼10 12 W/cm2, the nature of luminescence centres and their characteristic emission spectra remained similar to those observed at low excitation densities.
| langue originale | Anglais |
|---|---|
| Pages (de - à) | 870-876 |
| Nombre de pages | 7 |
| journal | Physica Status Solidi (C) Current Topics in Solid State Physics |
| Volume | 4 |
| Numéro de publication | 3 |
| Les DOIs | |
| état | Publié - 1 janv. 2007 |
| Modification externe | Oui |
| Evénement | 10th Europhysical Conference on Defects in Insulating Materials, EURODIM 2006 - Milano, Italie Durée: 10 juil. 2006 → 14 juil. 2006 |
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