Optical bleaching of Cr3+ luminescence in near stoichiometric LiNbO3 crystals codoped with MgO

T.P.J. Han, F. Jaque, L. Arizmendi, V. Bermudez, A. Suchocki

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

The emission intensity of the R-line of Cr3þ ions in near stoichiometric LiNbO3crystals codoped with MgO has been studied at a low temperature under excitation of the 4A2-4T1 transition. The R-line emission intensity associated with Cr3þ ions in the Nb5þ site, ½CrNb centre, was observed to decrease with the illumination time whereas the Cr3þ ions located in the Li site, ½CrLi centres, are optically stable. This selective bleaching is explained by considering the photoionization of Cr3þ ions in Nb5þ sites and the formation of Nb4þ:
Original languageEnglish
Pages (from-to)55-58
Number of pages3
JournalJournal of Luminescence
Volume108
DOIs
Publication statusPublished - Jun 2004

Keywords

  • stoichiometric LiNbO3
  • spectroscopy
  • MgO
  • Cr3þ
  • nanoscience

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