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Interaction between Two-Dimensional White-Light Photovoltaic Dark Spatial Solitons |
| LIU Zhao-Hong;LIU Si-Min;GUO Ru;GAO Yuan-Mei; SONG Tao;ZHU Nan;QU Di |
| Photonics Center, College of Physics Science, Nankai University, Tianjin 300071
The Key Lab of Advanced Technique and Fabrication for Weak-Light Nonlinear Photonics Materials (Ministry of Education), Nankai University, Tianjin 300457 |
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| Cite this article: |
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LIU Zhao-Hong, LIU Si-Min, GUO Ru et al 2007 Chin. Phys. Lett. 24 446-449 |
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Abstract Using fully incoherent white light emitted from an incandescent bulb (a line source) and amplitude mask, we study experimentally the interaction between two 2D white-light photovoltaic dark spatial solitons with three different separations (40μm, 50μm and 60μm) and arrangement directions (parallel to, perpendicular to and tilted at 45° with respect to the crystalline c axis) propagating in parallel in close proximity in self-defocusing LiNbO3:Fe crystal. Experimental results reveal that a 2D white-light dark soliton pair only experiences attractive forces when their mutual separation is sufficiently small (<60μm), and the degree of the attraction depends on their mutual separation and their arrangement direction. When the separation is larger than 60μm, the interaction is not evident.
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| Keywords:
42.65.Tg
42.65.-k
42.70.Nq
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Received: 11 July 2006
Published: 24 February 2007
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| PACS: |
42.65.Tg
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(Optical solitons; nonlinear guided waves)
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42.65.-k
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(Nonlinear optics)
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42.70.Nq
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(Other nonlinear optical materials; photorefractive and semiconductor materials)
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