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Phys Rev Lett. 2003 Dec 12;91(24):243903. Epub 2003 Dec 12.

New parametric scattering in photorefractive Sr0.61Ba0.39Nb2O6:Cr.

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  • 1Institute of Physics, Science Avenue 46, 03650, Kiev-39, Ukraine.


A new class of light-induced parametric scattering, not included in the conventional model, has been discovered in photorefractive Sr(0.61)Ba(0.39)Nb(2)O(6):Cr illuminated by two coherent beams. A novel model of multiwave mixing of coherent noise and transmitted light is developed to explain the new scattering phenomena. The model includes all known types and predicts a multitude of new types of parametric scattering. Generalized phase-matching conditions for parametric scattering in photorefractive crystals are proposed.

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