Interaction of in-band and in-gap lattice soliton trains in optically induced two-dimensional photonic lattices |
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Authors: | Liu Sheng Zhang Peng XiaoFa-Jun Gan Xue-Tao and ZhaoJian-Lin |
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Institution: | 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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Keywords: | soliton interaction in-band soliton gap soliton train photonic lattice |
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