强非局域空间三维光孤子短程相互作用

摘要

Basing on the accurate Gaussian analytical solution of a pair of ( 1 + 2) D optical spatial solitons with symmetrical oblique incidence,we investigated the short-range interactions in the strongly nonlocal nonlinear media. Two solitons in close proximity can be intertraped via the strong nonlocality ,and propagate together in a stable spiral and the trajectory of mass center of solitons will deflect because of the phase difference and the ratio of the power of two solitons under the condition of momentum conservation. It is possible to find its application in planar all-optical interconnection in bulk media. We analyszed the evolution of the Poynting vector as they propagate through the strongly nonlocal media.%利用强非局域非线性介质中傍轴光束传输的线性模型,根据不共面对称斜入射(1+2)维空间光孤子相互作用的解析解讨论了短程作用的情况.由能量守恒和动量守恒发现,这样的孤子在传输过程中其质心轨迹随着光束之间存在相位差而发生偏转.给出了最佳相位差,即以该相位差入射可以使光束质心偏转达到最大,使得在强非局域介质中通过调节相位差对三维光孤子实现全光控制成为可能.不同的振幅比对质心偏转也有影响.数值模拟了(1+2)维光孤子传输过程中坡印廷矢量(能流密度),分析了光孤子在传输过程中的坡印廷矢量变化,揭开了三维空间光孤子围绕质心旋转的物理本质.