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

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Han, T.P.J. and Jaque, F. and Arizmendi, L. and Bermudez, V. and Suchocki, A. (2004) Optical bleaching of Cr3+ luminescence in near stoichiometric LiNbO3 crystals codoped with MgO. Journal of Luminescence, 108. pp. 55-58. ISSN 0022-2313 (http://dx.doi.org/10.1016/j.jlumin.2004.01.010)

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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:

ORCID iDs

Han, T.P.J. ORCID logoORCID: https://orcid.org/0000-0002-2303-6861, Jaque, F., Arizmendi, L., Bermudez, V. and Suchocki, A.;
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