Optical solitons supported by finite waveguide lattices with diffusive nonlocal nonlinearity |
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Institution: | 1.Department of Electronic Information and Physics, Changzhi University, Changzhi 046011, China;2.School of Photoelectric Engineering, Guangdong Polytechnic Normal University, Guangzhou 510665, China;3.Department of Physics, Shaanxi University of Science & Technology, Xi'an 710021, China;4.King Abdullah University of Science and Technology(KAUST), Physical Science and Engineering Division(PSE), Thuwal 23955-6900, Saudi Arabia |
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Abstract: | We investigate the properties of fundamental, multi-peak, and multi-peaked twisted solitons in three types of finite waveguide lattices imprinted in photorefractive media with asymmetrical diffusion nonlinearity. Two opposite soliton self-bending signals are considered for different families of solitons. Power thresholdless fundamental and multi-peaked solitons are stable in the low power region. The existence domain of two-peaked twisted solitons can be changed by the soliton self-bending signals. When solitons tend to self-bend toward the waveguide lattice, stable two-peaked twisted solitons can be found in a larger region in the middle of their existence region. Three-peaked twisted solitons are stable in the lower (upper) cutoff region for a shallow (deep) lattice depth. Our results provide an effective guidance for revealing the soliton characteristics supported by a finite waveguide lattice with diffusive nonlocal nonlinearity. |
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Keywords: | optical solitons diffusive nonlocal nonlinearity linear stability analysis |
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