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Polaron luminescence in iron-doped lithium niobate

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Abstract

Photoluminescence related to the bound polaron Nb 4+Li is investigated as a function of temperature and incident light intensity in iron-doped lithium niobate crystals with various iron concentrations. Experiments are done under constant-wave (CW) and pulsed illumination. Its found that the decay time is always monoexponential. The radiative lifetime, the activation energy of the nonradiative lifetime and the quenching temperature are only weakly sensitive to iron concentration. On the other hand, the magnitude of the photoluminescence signal seems strongly correlated to the Fe2+ concentration, and the superlinear regime evidenced at low CW illumination definitely confirms that polaron excitation in lithium niobate is a two-step process.

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Authors and Affiliations

  1. Laboratoire Matériaux Optiques, Photonique et Systèmes, UMR CNRS 7132, University Paul Verlaine of Metz and Supélec, 2 rue E. Belin, 57070, Metz, France

    A. Harhira, L. Guilbert & P. Bourson

  2. Laboratoire de Physique des Matériaux, UMR CNRS 7556, Nancy, France

    H. Rinnert

Authors
  1. A. Harhira
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  2. L. Guilbert
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  3. P. Bourson
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  4. H. Rinnert
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Correspondence to A. Harhira.

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Harhira, A., Guilbert, L., Bourson, P. et al. Polaron luminescence in iron-doped lithium niobate. Appl. Phys. B 92, 555–561 (2008). https://doi.org/10.1007/s00340-008-3120-5

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  • DOI: https://doi.org/10.1007/s00340-008-3120-5

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