| Original Articles |
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Bright-Dark Vector Screening-Photovoltaic Spatial Solitons in
Biased Photorefractive-Photovoltaic Crystals |
| LU Ke-Qing1,2;QIAN Shi-Xiong1;DOU Chun-Sheng3;WU Zhen-Sen4 |
| 1Department of Physics, Fudan University, Shanghai
200433
2State Key Laboratory of Transient Optics Technology, Xi’an Institute of Optics and Precision Mechanics, Chinese Academic of Sciences, Xi’an 710068
3Department of Physics, Baoji College of Arts and
Sciences, Baoji 721007
4Department of Applied Physics, Xidian University, Xi’an 710071 |
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| Cite this article: |
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LU Ke-Qing, QIAN Shi-Xiong, DOU Chun-Sheng et al 2002 Chin. Phys. Lett. 19 1298-1300 |
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Abstract We show that the vector beam evolution equations in properly
oriented biased photorefractive-photovoltaic crystals can exhibit bright-dark vector solitons, which result from both the bulk photovoltaic effect and the spatially nonuniform screening of the external bias field. By adjusting the polarization of the incident beam to obtain the appropriate ratio of two orthogonal components, these vector solitons can be established. When the bulk photovoltaic effect is negligible, these vector solitons are bright-dark vector screening solitons. When the external field is absent, these vector solitons predict bright-dark vector photovoltaic solitons.
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| Keywords:
42.65.Hw
42.65.Jx
42.65.Tg
72.40.+w
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Published: 01 September 2002
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| PACS: |
42.65.Hw
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(Phase conjugation; photorefractive and Kerr effects)
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42.65.Jx
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(Beam trapping, self-focusing and defocusing; self-phase modulation)
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42.65.Tg
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(Optical solitons; nonlinear guided waves)
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72.40.+w
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(Photoconduction and photovoltaic effects)
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