Abstract : 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.
https://hal-cea.archives-ouvertes.fr/cea-01623583
Contributeur : Jerome Neauport
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Soumis le : mercredi 25 octobre 2017 - 14:31:51
Dernière modification le : jeudi 11 janvier 2018 - 06:21:16
Document(s) archivé(s) le : vendredi 26 janvier 2018 - 13:49:13
Jessica Fournier, Jérôme Neauport, Pierre Grua, Evelyne Fargin, Véronique Jubera, et al.. Green luminescence in silica glass: A possible indicator of subsurface fracture. Applied Physics Letters, American Institute of Physics, 2012, 100 (11), pp.114103. 〈https://doi.org/10.1063/1.3693393〉. 〈10.1063/1.3693393〉. 〈cea-01623583〉
