• On the nature of photoluminescence in Bismuth-doped silica glass

    • Oleksii V. Laguta
      Univ-Lille, CNRS, UMR 8523 – PhLAM - Physique des Lasers Atomes et Molécules, CERLA
    • Hicham El Hamzaoui
      Univ-Lille, CNRS, UMR 8523 – PhLAM - Physique des Lasers Atomes et Molécules, CERLA
    • Mohamed Bouazaoui
      Univ-Lille, CNRS, UMR 8523 – PhLAM - Physique des Lasers Atomes et Molécules, CERLA
    • Vladimir B. Arion
      Institut für Anorganische Chemie, Fakultät für Chemie, Universität Wien
    • Igor M. Razdobreev
      Univ-Lille, CNRS, UMR 8523 – PhLAM - Physique des Lasers Atomes et Molécules, CERLA
  • We report on the investigation of Bismuth-doped pure silica glass without other co-dopant by the tech- nique of magnetic circular dichroism (MCD), which allows the direct probing of the ground state of optical centres. Taking into account the results of conventional optical spectroscopy, we show that the observed MCD bands belong to the centre responsible for the red photoluminescence in this material. Measurements of the temperature and field dependences indicate that the MCD effect is caused by the even-electron system. This, however, opposes the widespread opinion that Bi2+ ions are the origin of red photoluminescence in Bismuth-doped silica glasses. On the other hand, the lasing centre responsi- ble for the near infrared photoluminescence does not exhibit any magnetic optical activity connected to its ground state. As a consequence, we conclude that the ground state of lasing centre is a magnetic singlet with the effective spin S = 0.

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  • http://phaidra.univie.ac.at/o:918676

  • Wissenschaftlicher Artikel

  • Veröffentlichte Version

  • Scientific Reports

  • 2017

  • 7

  • Springer Nature

  • Englisch

  • Frei zugänglich

  • CC BY Namensnennung 4.0 International
    © The Author(s) 2017

  • 2045-2322

  • Electronic properties and materials; Fibre lasers; Glasses