3 December 2003 Autowaves in ferroelectrics
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Abstract
In the paper we theoretically consider the dynamics of the inner field generated by recharging trap waves propagation and spatial-temporal features of the photoinduced light scattering caused by these phenomena in photo-ferroelectrics with two donor levels under steady illumination by laser beam. The transverse instability of the interacting light beams and both the photovoltaic current from each donor level and the diffusion mechanisms of carrier transfer are taken into account in the proposed model. It has been shown that, under the definite relation between the photoionization velocities and anti-collinear Glass vectors of the donor levels, among all possible scenarios of transverse instabilities the boundary circle will be realized in the perfect crystal. Due to this phenomenon the periodical photoinduced light scattering appears. So the great attention has been paid to the description of the optical autowaves generation in ilmenites. All the main theoretical results are in a good agreement with the available experimental data.
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Anna N. Morozovska, Vyacheslav V. Obukhovsky, "Autowaves in ferroelectrics", Proc. SPIE 5257, Ninth International Conference on Nonlinear Optics of Liquid and Photorefractive Crystals, (3 December 2003); doi: 10.1117/12.545858; https://doi.org/10.1117/12.545858
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