TY - GEN
T1 - Photoluminescence lifetime in silica glasses excited by vacuum ultra violet laser irradiation
AU - Nishikawa, Hiroyuki
AU - Nakamura, Ryuta
AU - Nagasawa, Kaya
AU - Ohki, Yoshimichi
AU - Hama, Yoshimasa
PY - 1991/12/1
Y1 - 1991/12/1
N2 - Photoluminescence bands in silica glasses excited by a VUV (vacuum ultraviolet) laser (7.9 eV) are reported. Luminescence spectra of various types of silicas, prepared under different conditions, exhibit sample-to-sample variations. Several luminescence bands (1.9-eV, 2.7-eV, 3.1-eV, 4.2-eV, 4.3-eV, and 2-4-eV bands) were observed at room temperature. The 2.7-eV band, previously ascribed to a triplet-to-singlet transition of neutral oxygen vacancy, shows a slow decay rate of τ ≅ 10 ms. Relatively slow decay rates of τ ≅ 15 μs and τ ≅ 110 μs were obtained for the 1.9- and 3.1-eV bands, respectively.
AB - Photoluminescence bands in silica glasses excited by a VUV (vacuum ultraviolet) laser (7.9 eV) are reported. Luminescence spectra of various types of silicas, prepared under different conditions, exhibit sample-to-sample variations. Several luminescence bands (1.9-eV, 2.7-eV, 3.1-eV, 4.2-eV, 4.3-eV, and 2-4-eV bands) were observed at room temperature. The 2.7-eV band, previously ascribed to a triplet-to-singlet transition of neutral oxygen vacancy, shows a slow decay rate of τ ≅ 10 ms. Relatively slow decay rates of τ ≅ 15 μs and τ ≅ 110 μs were obtained for the 1.9- and 3.1-eV bands, respectively.
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M3 - Conference contribution
AN - SCOPUS:0026290254
SN - 0879425687
T3 - Proc 3 Int Conf Prop Appl Dielectr Mater
SP - 1032
EP - 1035
BT - Proc 3 Int Conf Prop Appl Dielectr Mater
PB - Publ by IEEE
T2 - Proceedings of the 3rd International Conference on Properties and Applications of Dielectric Materials
Y2 - 8 July 1991 through 12 July 1991
ER -