We consider a topological Floquet insulator realized as a honeycomb array of helical waveguides imprinted in a weakly birefringent medium. The system accounts for four-wave mixing occurring at a series of resonances arising due to Floquet phase matching. Under these resonant conditions, the system sustains stable linearly polarized and metastable elliptically polarized two-component edge solitons. Coupled nonlinear equations describing the evolution of the envelopes of such solitons are derived.

中文翻译：

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四波混合 Floquet 拓扑孤子

我们考虑将拓扑 Floquet 绝缘体实现为压印在弱双折射介质中的蜂窝状螺旋波导阵列。该系统考虑了在由于 Floquet 相位匹配而产生的一系列共振中发生的四波混合。在这些共振条件下，系统维持稳定的线性极化和亚稳态椭圆极化的双分量边缘孤子。导出了描述这种孤子包络演化的耦合非线性方程。