Reduction of the space-charge field in photorefractive crystalsReport as inadecuate




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1 University of Joensuu 2 Laboratoire Charles Fabry de l-Institut d-Optique - Manolia LCFIO - Laboratoire Charles Fabry de l-Institut d-Optique

Abstract : The space-charge-field amplitude inside photorefractive crystals was evaluated using three different experimental techniques: i two-wave mixing gain measurements, ii direct phase demodulation under external dc-electric field, and iii phase demodulation under ac-field with proper polarization filtering. The experimental data could be simultaneously fitted with the theory in the frame of the traditional one-level photorefractive model only if an additional reduction of the space-charge field is assumed. The traditional model fails to explain appearance of this reduction factor. Measurements were carried out with Bi12TiO20 and GaP photorefractive crystals





Author: Kimmo Paivasaari - Alexei A. Kamshilin - Philippe Delaye - Gérald Roosen -

Source: https://hal.archives-ouvertes.fr/



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