Jisha Chandroth P, Alberucci Alessandro, Lee Ray-Kuang, Assanto Gaetano
Centro de Física do Porto, Faculdade de Ciências, Universidade do Porto, R. Campo Alegre 687, Porto 4169-007, Portugal.
Opt Express. 2013 Aug 12;21(16):18646-60. doi: 10.1364/OE.21.018646.
We investigate the dynamics of spatial optical solitons launched in a medium with a finite perturbation of the refractive index. For longitudinally short perturbations of super-Gaussian transverse profile, as the input power varies we observe a transition from a wave-like behavior where solitons break up into multiple fringes to a particle-like behavior where solitons acquire a transverse velocity retaining their shape. For longitudinally long perturbations with an attractive potential solitons get trapped inside the well and propagate with transverse periodic oscillations, resulting in an efficient power-dependent angular steering or deflection. Using the Ehrenfest theorem we derive analytical expressions for soliton trajectory, and achieve excellent agreement between theory and numerical simulations for large powers, that is, narrow solitons.
我们研究了在具有有限折射率扰动的介质中发射的空间光学孤子的动力学特性。对于超高斯横向分布的纵向短扰动，随着输入功率的变化，我们观察到从孤子分裂成多个条纹的波动行为到孤子获得横向速度并保持其形状的粒子状行为的转变。对于具有吸引势的纵向长扰动，孤子被困在阱内并以横向周期性振荡传播，从而导致有效的功率相关角转向或偏转。利用埃伦费斯特定理，我们推导了孤子轨迹的解析表达式，并在大功率情况下，即窄孤子情况下，实现了理论与数值模拟的良好一致性。
