Green luminescence in silica glass: A possible indicator of subsurface fracture
Langue
en
Article de revue
Ce document a été publié dans
Applied Physics Letters. 2012, vol. 100, n° 11, p. 114103
American Institute of Physics
Résumé en anglais
We investigate the nature of defects triggering laser damage in fused silica in subsurface fractures in nanosecond near ultraviolet regime. Mechanical, laser induced surface flaws as well as pristine silica surface were ...Lire la suite >
We investigate the nature of defects triggering laser damage in fused silica in subsurface fractures in nanosecond near ultraviolet regime. Mechanical, laser induced surface flaws as well as pristine silica surface were characterized by optical microscopy and luminescence confocal microscopy before and after acid etching. In all cases, photoluminescence decreases with etching time assessing the existence of defects close to the surface. Spectral analysis of the evolution of these signals during etching allows new interpretations of the nature of precursors inducing damage. Green luminescence around 2.25 eV is seen as a potential subsurface fracture indicator leading to laser damage.< Réduire
Mots clés en anglais
Luminescence
Acids
Photoluminescence
Silica
Etching
Origine
Importé de halUnités de recherche