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Theory of Luminescence Anisotropy of YAlO 3 :Nd 3+ Single Crystals
Author(s) -
Aminov L. K.,
Kaminskii A. A.,
Chertanov M. I.
Publication year - 1985
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221300240
Subject(s) - luminescence , ion , anisotropy , electric dipole transition , dipole , electric field , atomic physics , crystal (programming language) , materials science , magnetic dipole , physics , optics , quantum mechanics , computer science , programming language
Based on the microscopic model of activator centres in crystals theoretical calculations of the anisotropic intensity of luminescent radiation of Nd 3+ ions in the YAlO 3 single crystals are carried out. The parameters of the effective electric‐dipole moment operator of Nd 3+ ions describing the probabilities of the transitions in 4 F 3/2 → 4 I 9/2 ‐15/2 channels are obtained and the interference of two basic electric‐dipole transition mechanisms are taken into account. In one of these mechanisms electric‐dipole transitions are allowed due to the mixing of opposite parity states to the ground 4f N ‐configuration of the lanthanide ions by the odd terms of the crystal field, in the another one the f‐f transitions are induced by variable components of the even crystal field modulated by the radiation field. The obtained anisotropy of the luminescent inter‐manifold branching ratios and calculated lifetime of the 4 F 3/2 state of Nd 3+ ions well agree with experimental situation. Using as an example the results obtained in this work, the question of the applicability of the present model for the analysis of the spectral properties of anisotropic crystals doped with Ln 3+ ions, is discussed.