Generation and recombination of defects in vitreous silica induced by irradiation with a near-infrared femtosecond laser

Hong Bo Sun, Saulius Juodkazis, Mitsuru Watanabe, Shigeki Matsuo, Hiroaki Misawa, Junji Nishii

研究成果: Article査読

96 被引用数 (Scopus)

抄録

Properties of defects induced by irradiation with a near-infrared femtosecond laser beam into vitreous silica are reported. Three photoluminescence bands with photon energy of 1.9, 2.7, and 4.4 eV were observed under an excitation of 5.0 eV. An isochronal annealing experiment revealed that unrelaxed oxygen vacancies ODC(II) and interstitial oxygen were generated as dominant species during the irradiation. In the annealing, diffusion of the interstitial oxygen was thermally activated, leading to a direct reduction of oxygen-deficiency-related defects such as ODC(II) and E′ center. The concentration of oxygen-excess-related defects such as peroxy radicals, together with nonbridging oxygen-hole centers, increased first with annealing then decreased with the exhaustion of oxygen and their precursor, the E′ center. The recombination of oxygen vacancies with interstitial oxygen is characterized as the major process occurring during the annealing.

本文言語English
ページ(範囲)3450-3455
ページ数6
ジャーナルJournal of Physical Chemistry B
104
15
DOI
出版ステータスPublished - 2000 4 20
外部発表はい

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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