Pei Yumiao, Wang Zhaoyuan, Hu Yi, Lou Cibo, Chen Zhigang, Xu Jingjun
Opt Lett. 2020 Jun 1;45(11):3175-3178. doi: 10.1364/OL.394838.
We demonstrate that a single Gaussian-like beam can self-bend during nonlinear propagation in a uniform photonic lattice. The two components of the beam experiencing normal and anomalous diffractions spontaneously separate and form a pair in a diametric-drive acceleration due to nonlinear action. Such a diametric drive generally describes a jointly accelerating behavior of two beams analogous to positive- and negative-mass objects. The influences of the initial momentum of the input beam and the nonlinear strength are considered in this process. We further realize a self-bending propagation for a partially coherent light beam and discuss the impact of incoherence on the acceleration strength.
我们证明，单束类高斯光束在均匀光子晶格中的非线性传播过程中能够自弯曲。由于非线性作用，经历正常衍射和反常衍射的光束的两个分量会自发分离，并在径向驱动加速过程中形成一对。这种径向驱动通常描述了两束光的联合加速行为，类似于正质量和负质量物体。在此过程中考虑了输入光束的初始动量和非线性强度的影响。我们进一步实现了部分相干光束的自弯曲传播，并讨论了非相干性对加速强度的影响。
