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Photoconductivity in Yb-doped oxides at high excitation densities

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Abstract

Photoconductivity has been found in the dielectric laser materials Yb3+:YAG and Yb3+:Lu2O3 under 940 nm irradiation with an unexpected high photocurrent up to several 100 nanoampères. The nonlinear intensity dependence points to the occurrence of a cooperative upconversion mechanism with 2–3 excited Yb3+-ions in YAG and 2 excited Yb3+-ions in Lu2O3 being involved. According to the results two tentative models of this upconversion process are discussed.

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Authors and Affiliations

  1. Institute of Laser-Physics, University of Hamburg, Luruper Chaussee 149, 22761, Hamburg, Germany

    C. Brandt, S. T. Fredrich-Thornton, K. Petermann & G. Huber

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  1. C. Brandt
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  2. S. T. Fredrich-Thornton
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  3. K. Petermann
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  4. G. Huber
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Correspondence to C. Brandt.

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Brandt, C., Fredrich-Thornton, S.T., Petermann, K. et al. Photoconductivity in Yb-doped oxides at high excitation densities. Appl. Phys. B 102, 765–768 (2011). https://doi.org/10.1007/s00340-010-4369-z

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  • DOI: https://doi.org/10.1007/s00340-010-4369-z

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