Higher-order space-charge field effects on the self-deflection of photovoltaic dark spatial solitons |
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Authors: | Guangyong Zhang Jinsong Liu Huilan Zhang Cheng Wang Shixiong Liu |
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Affiliation: | aState Key Laboratory of Laser Technology, Huazhong University of Science and Technology, Wuhan, 430074, PR China;bDepartment of Physics, China University of Geosciences, Wuhan, 430074, PR China |
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Abstract: | We investigate theoretically the effects of higher-order space-charge field on the self-deflection of photovoltaic dark spatial solitons by 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 photovoltaic dark solitons possess self-deflection process during propagation, and the solitons always bend in the direction of the c-axis of the crystal. The self-deflection of dark solitons can experience considerable increase especially in the regime of high photovoltaic field strengths. Relevant examples are provided. |
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Keywords: | Nonlinear optics Spatial optical solitons Photorefractive effects Photovoltaic effects |
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