标题： 空间-光谱涡旋孤子在二次晶格中 显示英文标题

标题： Spatial-Spectral Vortex Solitons in Quadratic Lattices

摘要： 我们预测在一维周期波导阵列中存在空间-光谱涡旋孤子，该阵列具有二次非线性响应。 在这样的涡旋中，能量流通过基频的相位梯度和二次谐波场的共同作用形成闭合回路，并且光谱成分之间的参数频率转换也起作用。 线性稳定性分析表明，这些模式在广泛的参数区域内是稳定的。 显示英文摘要

摘要： We predict the existence of spatial-spectral vortex solitons in one-dimensional periodic waveguide arrays with quadratic nonlinear response. In such vortices the energy flow forms a closed loop through the simultaneous effects of phase gradients at the fundamental frequency and second-harmonic fields, and the parametric frequency conversion between the spectral components. The linear stability analysis shows that such modes are stable in a broad parameter region.