Photodynamic processes in Ce + Yb:CaF2 crystals investigation

A. S. Nizamutdinov; V. V. Semashko; A. K. Naumov; R. Yu. Abdulsabirov; S. L. Korableva; M. A. Marisov

doi:10.1117/12.562185

20 April 2004 Photodynamic processes in Ce + Yb:CaF₂ crystals investigation

A. S. Nizamutdinov, V. V. Semashko, A. K. Naumov, R. Yu. Abdulsabirov, S. L. Korableva, M. A. Marisov

Proceedings Volume 5402, International Workshop on Quantum Optics 2003; (2004) https://doi.org/10.1117/12.562185
Event: International Workshop on Quantum Optics 2003, 2003, St. Petersburg, Russian Federation

Abstract

Here the photochemical properties of CaF₂ crystal doped by Ce³⁺ and Yb³⁺ ions under pumping with ultraviolet (UV) irradiation resonant to the Ce³⁺ ion interconfigurational 5d-4f transitions were studied and significant codoping effect on the crystal solarization suppression was observed. The photodynamic processes model occurring in the active medium and which taking into account the color center formation and processes of enhanced free charges recombination via valence change of variety of impurity centers was proposed. This model allows to explain both electronic and hole types color centers suppression in Ce:CaF₂ sampels codoped by Yb³⁺ ions. It was shown that Yb³⁺ ions in the crystal act as centers of electron and hole recombination with probability dependent on the extra charge compensation type. Therefore the proposed antisolarant mechanism of the coactivation effect satisfactorily describes photochemical properties of fluorite and other crystal hosts.

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A. S. Nizamutdinov, V. V. Semashko, A. K. Naumov, R. Yu. Abdulsabirov, S. L. Korableva, and M. A. Marisov "Photodynamic processes in Ce + Yb:CaF₂ crystals investigation", Proc. SPIE 5402, International Workshop on Quantum Optics 2003, (20 April 2004); https://doi.org/10.1117/12.562185

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