TY - JOUR
T1 - Selective optical bleaching of Cr3+ luminescence at low temperature in MgO codoped near stoichiometric LiNbO3:Cr crystals
AU - Han, P. J.
AU - Jaque, F.
AU - Arizméndi, L.
AU - Bermúdez, V.
AU - Suchocki, A.
AU - Kaminska, A.
AU - Kobyakov, S.
PY - 2003
Y1 - 2003
N2 - Selective R-line emission of the Cr3+ ions in near stoichiometric LiNbO3 crystals codoped with MgO has been studied at low temperature under excitation into the [math equation] transition. The emission intensity of R lines associated with Cr3+ ions located in Nb5+ sites, [Cr]Nb centers, was observed to decrease with the illumination time, whereas those ascribed to other Cr3+ 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 Cr3+ ions in Nb sites and the formation of Nb4+ complexes (small polaron).
AB - Selective R-line emission of the Cr3+ ions in near stoichiometric LiNbO3 crystals codoped with MgO has been studied at low temperature under excitation into the [math equation] transition. The emission intensity of R lines associated with Cr3+ ions located in Nb5+ sites, [Cr]Nb centers, was observed to decrease with the illumination time, whereas those ascribed to other Cr3+ 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 Cr3+ ions in Nb sites and the formation of Nb4+ complexes (small polaron).
UR - https://www.scopus.com/pages/publications/0344009612
U2 - 10.1103/PhysRevB.68.132103
DO - 10.1103/PhysRevB.68.132103
M3 - Article
AN - SCOPUS:0344009612
SN - 1098-0121
VL - 68
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 13
ER -