Szukana fraza: [Abstrakt = "We investigate the effects of higher\-order space charge field on the self\-deflection of bright screening spatial solitons due to two\-photon photorefractive effects by a numerical method under steady\-state conditions. The expression for an induced space charge electric field including higher\-order space charge field terms is obtained. Numerical results indicate that bright screening solitons undergo self\-deflection process during propagation, and the solitons always bend in the opposite direction of the c axis of the crystal. The self\-deflection of bright screening solitons can experience considerable increase especially in the regime of high bias field strengths. Relevant examples are provided."]

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