Spectral properties of LiTaO3:Pr3+ under high hydrostatic pressure

The high-pressure photoluminescence of the LiTaO3:Pr3+ system obtained for the pressure range from ambient to 232 kbar at 20 K and ambient temperatures is presented. The observed pressure red shift of all spectral lines representing the f-f transitions is related to the changes in F2 Racach integral...

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Bibliographic Details
Published in:Journal of physics. Condensed matter 2005-09, Vol.17 (35), p.5381-5395
Main Authors: Gryk, W, Dyl, D, Ryba-Romanowski, W, Grinberg, M
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation
Other solid inorganic materials
Photoluminescence
Physics
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Summary:The high-pressure photoluminescence of the LiTaO3:Pr3+ system obtained for the pressure range from ambient to 232 kbar at 20 K and ambient temperatures is presented. The observed pressure red shift of all spectral lines representing the f-f transitions is related to the changes in F2 Racach integral and the spin-orbit coupling with pressure. To analyse the deexcitation kinetics and the dependence of the intensity of the 3Po - > 3H4 and 1D2 - > 3H4 on the excitation wavelength and pressure we propose a model of a Pr 3+ trapped exciton with a hole localized at the Pr 3' and an electron at the Rydberg states bounded by the long-range Coulomb potential of the hole.
ISSN:0953-8984
1361-648X
DOI:10.1088/0953-8984/17/35/006