Luminescence study of defects in silica glasses under near-UV excitation
作者： J. Fournier , J. Néauport , P. Grua , V. Jubera , E. Fargin
DOI: 10.1016/J.PHPRO.2010.10.009
关键词: Excited state 、 Excitation 、 Optics 、 Silica glass 、 Photoluminescence 、 Confocal microscopy 、 Materials science 、 Molecular physics 、 Yield (engineering) 、 Luminescence 、 Wavelength
摘要: Abstract In this paper, we report the results of photo-luminescence experiments on high purity silica glass. Two different types defects located optical pieces are investigated: indented sites and laser damage craters. Visible luminescence excited at wavelength 325 nm (3.81 eV) is observed using confocal microscopy. Each type defect produces qualitatively spectra. case sites, well known Oxygen Deficient Center (ODC) band peaking 2.75 eV clearly observed, while for areas, another classical luminescent object found: Non Bridging Hole (NBOHC) which peaks 1.9 eV. On both defects, spectra yield a strong peak around 2.2 eV but its interpretation still controversory.
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