Generation and manipulation of bright spatial bound-soliton pairs under the diffusion effect in photovoltaic photorefractive crystals
Ze-Xian Zhang(张泽贤), Xiao-Yang Zhao(赵晓阳), Ye Li(李烨), Hu Cui(崔虎)†, Zhi-Chao Luo(罗智超), Wen-Cheng Xu(徐文成), and Ai-Ping Luo(罗爱平)
1Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices & Guangzhou Key Laboratory for Special Fiber Photonic Devices and Applications, South China Normal University, Guangzhou 510006, China
The generation and propagation characteristics of bright spatial bound-soliton pairs (BSPs) are investigated under the diffusion effect in photovoltaic photorefractive crystals by numerical simulation. The results show that two coherent solitons, one as the signal light and the other as the control light, can form a BSP when the peak intensity of the control light is appropriately selected. Moreover, under the diffusion effect, the BSP experiences a self-bending process during propagating and the center of the BSP moves on a parabolic trajectory. Furthermore, the lateral shift of the BSP at the output face of the crystal can be manipulated by adjusting the peak intensity of the control light. The research results provide a method for the design of all-optical switching and routing based on the manipulation of the lateral position of BSPs.
* Project supported by the National Natural Science Foundation of China (Grant Nos. 61875058, 11874018, 11974006, and 61378036).
Cite this article:
Ze-Xian Zhang(张泽贤), Xiao-Yang Zhao(赵晓阳), Ye Li(李烨), Hu Cui(崔虎)†, Zhi-Chao Luo(罗智超), Wen-Cheng Xu(徐文成), and Ai-Ping Luo(罗爱平) Generation and manipulation of bright spatial bound-soliton pairs under the diffusion effect in photovoltaic photorefractive crystals 2020 Chin. Phys. B 29 104208
Fig. 1.
Intensity FWHM of bright solitons versus A.
Fig. 2.
(a) Sum of squares of deviations from mean D as a function of A2 for the cases of θ = π (solid curve) and θ = 0 (dashed curve). Panel (b) is enlargement of (a) in the vertical direction.
Fig. 3.
Intensity contours showing the propagation dynamics of two out of phase solitons for A1 = 0.1 and A2 = 0.1 (a), 0.163 (b), 0.176 (c), 0.181 (d), 0.214 (e), 0.231 (f), 0.251 (g), 0.258 (h), 0.28 (i).
Fig. 4.
Relation (a) between propagation distance ξ and the spacing, and (b) between ξ and the peak intensity for two anti-phase solitons.
Fig. 5.
Intensity contours showing the propagation dynamics of two in-phase solitons for A1 = 0.1 and A2 = 0.1 (a), 0.139 (b), 0.196 (c), and 0.253 (d).
Fig. 6.
Relation (a) between propagation distance ξ and the spacing, and (b) between ξ and the peak intensity for two in-phase solitons.
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