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Evaluation of electro-optic, elasto-optic, piezoelectric, and elastic coefficients of Ba0.77Ca0.23TiO3 through orientation dependent photorefractive beam coupling

Sylvie Bernhardt 1 Lauren Mize 1 Philippe Delaye 1 Gérald Roosen 1
1 Laboratoire Charles Fabry de l'Institut d'Optique / Manolia
LCFIO - Laboratoire Charles Fabry de l'Institut d'Optique
Abstract : We present a demonstration of the influence of the indirect electro-optic effect on the photorefractive performance of Ba0.77Ca0.23TiO3 ~BCT!. The comparison of the orientation dependence of the two-beam coupling energy transfer gain with theoretical model allows us to obtain information on the electro-optic coefficients, but also an evaluation of the unknown elasto-optic, piezoelectric, and elastic stiffness coefficients of BCT. We found r13 T 533 pmV21 and r33 T 5170 pmV21. These values are in good agreement with other published values. For the interesting coefficient r42 T , we find a higher value r42 T 5465 pmV21 than the one previously published. From this study we also determine that as in the case of BaTiO3 , the optimal orientation is given by a 45°-cut BCT
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Sylvie Bernhardt, Lauren Mize, Philippe Delaye, Gérald Roosen. Evaluation of electro-optic, elasto-optic, piezoelectric, and elastic coefficients of Ba0.77Ca0.23TiO3 through orientation dependent photorefractive beam coupling. Journal of Applied Physics, American Institute of Physics, 2002, 92 (10), pp.6139-6148. ⟨10.1063/1.1515950⟩. ⟨hal-00673427⟩

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