Selective optical bleaching of Cr3+ luminescence at low temperature in MgO codoped near stoichiometric LiNbO3:Cr crystals

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

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Selective R-line emission of the Cr31 ions in near stoichiometric LiNbO3 crystals codoped with MgO has been studied at low temperature under excitation into the 4A2!4T1 transition. The emission intensity of R lines associated with Cr31 ions located in Nb51 sites, @Cr#Nb centers, was observed to decrease with the illumination time, whereas those ascribed to other Cr31 ions, such as those located in the Li site, @Cr#Li centers, are optically stable. The selective bleaching is explained by considering the photoinization of Cr31 ions in Nb sites and the formation of Nb41 complexes ~small polaron!.
Original languageEnglish
Pages (from-to)132103-1-132103-4
JournalPhysical Review B: Condensed Matter and Materials Physics
Volume68
Issue number13
DOIs
Publication statusPublished - 29 Oct 2003

Keywords

  • selective optical bleaching
  • Cr3+ luminescence
  • MgO
  • stoichiometric LiNbO3
  • Cr crystals
  • nanoscience

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