Optical absorption and luminescence of LiTaO3:Cr and LiTaO3:Cr,Nd crystals

Stanislaw Golab; I. Sokolska; Grazyna Dominiak-Dzik; M. N. Palatnikov; N. V. Sidorov; I. Biryukova; V. T. Kalinnikov; Witold Ryba-Romanowski

doi:10.1117/12.343003

24 March 1999 Optical absorption and luminescence of LiTaO₃:Cr and LiTaO₃:Cr,Nd crystals

Stanislaw Golab, I. Sokolska, Grazyna Dominiak-Dzik, M. N. Palatnikov, N. V. Sidorov, I. Biryukova, V. T. Kalinnikov, Witold Ryba-Romanowski

Author Affiliations +

Proceedings Volume 3724, International Conference on Solid State Crystals '98: Single Crystal Growth, Characterization, and Applications; (1999) https://doi.org/10.1117/12.343003
Event: International Conference on Solid State Crystals '98, 1998, Zakopane, Poland

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.

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Stanislaw Golab, I. Sokolska, Grazyna Dominiak-Dzik, M. N. Palatnikov, N. V. Sidorov, I. Biryukova, V. T. Kalinnikov, and Witold Ryba-Romanowski "Optical absorption and luminescence of LiTaO₃:Cr and LiTaO₃:Cr,Nd crystals", Proc. SPIE 3724, International Conference on Solid State Crystals '98: Single Crystal Growth, Characterization, and Applications, (24 March 1999); https://doi.org/10.1117/12.343003

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