PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
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The interaction of in-band and in-gap lattice soliton trains in optically induced two-dimensional photonic lattices |
Liu Sheng(刘圣), Zhang Peng(张鹏), Xiao Fa-Jun(肖发俊), Gan Xue-Tao(甘雪涛), and Zhao Jian-Lin(赵建林)† |
Shaanxi Key Laboratory of Optical Information Technology, School of Science, Northwestern Polytechnical University, Xi'an 710072, China;The Key Laboratory of Space Applied Physics and Chemistry, Ministry of Education, Xi'an 710072, China |
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Abstract We demonstrate the coherent interactions of lattice soliton trains, including in-band solitons (IBSs) and gap soliton trains (GSTs), in optically induced two-dimensional photonic lattices with self-defocusing nonlinearity. It is revealed that the $\pi$-staggered phase structures of the lattice soliton trains will lead to anomalous interactions. Solely by changing their initial separations, the transition between attractive and repulsive interaction forces or reversion of the energy transfer can be obtained. The `negative refraction' effect of the soliton trains on the interaction is also discussed. Moreover, two interacting IBSs can merge into one GST when attraction or energy transfer happens.
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Received: 16 October 2009
Accepted manuscript online:
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PACS:
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42.65.Tg
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(Optical solitons; nonlinear guided waves)
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42.70.Qs
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(Photonic bandgap materials)
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Fund: Project supported by the
Northwestern Polytechnical University (NPU) Foundation for
Fundamental Research and the Doctorate Foundation of NPU (Grant
No.~CX200914). |
Cite this article:
Liu Sheng(刘圣), Zhang Peng(张鹏), Xiao Fa-Jun(肖发俊), Gan Xue-Tao(甘雪涛), and Zhao Jian-Lin(赵建林) The interaction of in-band and in-gap lattice soliton trains in optically induced two-dimensional photonic lattices 2010 Chin. Phys. B 19 065203
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