Analysis of the Eu³⁺ emission in a SrWO₄ laser matrix under pressure

Fernando Rivera-López Departamento de Física Fundamental y Experimental, Electrónica y Sistemas;Correspondence[email protected]

I. R. Martín Departamento de Física Fundamental y Experimental, Electrónica y Sistemas;

I. Da Silva Departamento de Física Fundamental II, Facultad de Física, Universidad de La Laguna, E-38200 San Cristóbal de La Laguna, Santa Cruz de Tenerife, Spain

C. González-Silgo Departamento de Física Fundamental II, Facultad de Física, Universidad de La Laguna, E-38200 San Cristóbal de La Laguna, Santa Cruz de Tenerife, Spain

U. R. Rodríguez-Mendoza Departamento de Física Fundamental y Experimental, Electrónica y Sistemas;

V. Lavín Departamento de Física Fundamental y Experimental, Electrónica y Sistemas;

F. Lahoz Departamento de Física Fundamental y Experimental, Electrónica y Sistemas;

S. Maceda Díaz-González Departamento de Física Fundamental y Experimental, Electrónica y Sistemas;

M. L. Martínez-Sarrión Departamento de Química Inorgánica, Facultad de Química, Universidad de Barcelona, Marti i Franquès 1-11, E-08028, Barcelona, Spain

L. Mestres Departamento de Química Inorgánica, Facultad de Química, Universidad de Barcelona, Marti i Franquès 1-11, E-08028, Barcelona, Spain

J. Fernández-Urban Departamento de Química Inorgánica, Facultad de Química, Universidad de Barcelona, Marti i Franquès 1-11, E-08028, Barcelona, Spain

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Abstract

Optical properties of the SrWO₄ matrix doped with different Eu³⁺ concentrations (10%, 13% and 20%) have been studied. At ambient pressure, the temporal evolution of the emissions from the ⁵D₁ level has been analyzed in the different doped crystals in order to discuss the energy transfer processes between the Eu³⁺ ions. This study lets conclude that the Eu³⁺ ions are randomly distributed in the matrix. Moreover, the ⁵D₀→⁷F_{1, 2} emissions have been measured increasing the pressure up to 15 GPa in order to analyze the changes in the Eu³⁺ local structure. The results confirm the existence of a structural phase transition around 8.5 GPa.

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Acknowledgements

This work has been partially supported by ‘Ministerio de Educacíon y Ciencia’ (MAT 2004-6868). Fernando Rivera-López is grateful to the CajaCanarias PhD Grant for the financial assistance.

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Analysis of the Eu³⁺ emission in a SrWO₄ laser matrix under pressure

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Analysis of the Eu³⁺ emission in a SrWO₄ laser matrix under pressure