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Proceedings Paper

Optical absorption and luminescence of LiTaO3:Cr and LiTaO3:Cr,Nd crystals
Author(s): Stanislaw Golab; I. Sokolska; Grazyna Dominiak-Dzik; M. N. Palatnikov; N. V. Sidorov; I. Biryukova; V. T. Kalinnikov; Witold Ryba-Romanowski
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Paper Abstract

In this work we investigate spectroscopic properties of Cr3+ and Cr3+ - Nd3+ interaction in LiTaO3 using optical absorption, luminescence and luminescence decay times at temperatures between 5 K and 300 K. Some preliminary data obtained with singly doped LiTaO3:Cr at low activator concentration are given in our previous work. Recorded spectra indicate that both the Cr3+ and Nd3+ are located in several non- equivalent sites which differ in the strength of the crystal field. Luminescence spectrum of Cr3+ consists of a broad band whose maximum and intensity depend on temperature. Below about 50 K an additional sharp band with four distinct components appears in the spectrum. The broad band attributed to the spin allowed 4T2 - 4A2 transition of Cr3+ ions overlaps two absorption bands of Nd3+ ions at about 810 nm and 890 nm making the Cr3+ - Nd3+ energy transfer process feasible. Results of measurements are discussed and compared to those obtained with LiNbO3:Cr.

Paper Details

Date Published: 24 March 1999
PDF: 4 pages
Proc. SPIE 3724, International Conference on Solid State Crystals '98: Single Crystal Growth, Characterization, and Applications, (24 March 1999); doi: 10.1117/12.343003
Show Author Affiliations
Stanislaw Golab, Institute of Low Temperature and Structure Research (Poland)
I. Sokolska, Institute of Low Temperature and Structure Research (Poland)
Grazyna Dominiak-Dzik, Institute of Low Temperature and Structure Research (Poland)
M. N. Palatnikov, Institute of Chemistry (Russia)
N. V. Sidorov, Institute of Chemistry (Russia)
I. Biryukova, Institute of Chemistry (Russia)
V. T. Kalinnikov, Institute of Chemistry (Russia)
Witold Ryba-Romanowski, Institute of Low Temperature and Structure Research (Poland)


Published in SPIE Proceedings Vol. 3724:
International Conference on Solid State Crystals '98: Single Crystal Growth, Characterization, and Applications
Andrzej Majchrowski; Jerzy Zielinski, Editor(s)

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