论文标题
Floquet工程等离激元波导阵列中异常$π$ mode的实量和傅立叶空间观察
Real- and Fourier-space observation of the anomalous $π$-mode in Floquet engineered plasmonic waveguide arrays
论文作者
论文摘要
我们提出了由驱动的Su-Schrieffer-Heeger模型的联合实验和理论研究，该模型由evanescyly耦合的等离子波导阵列实现。 Floquet理论预测，该系统可容纳适合驱动频率的拓扑保护边缘状态，该状态在静态系统中没有对应物，即所谓的异常浮光拓扑$π$ -Mode。通过将实时和傅立叶空间泄漏辐射显微镜与边缘和散装激发结合使用，我们明确地识别异常的浮光拓扑$π$ - 模式并研究其频率依赖性。
We present a joint experimental and theoretical study of the driven Su-Schrieffer-Heeger model implemented by arrays of evanescently coupled plasmonic waveguides. Floquet theory predicts that this system hosts for suitable driving frequencies a topologically protected edge state that has no counterpart in static systems, the so-called anomalous Floquet topological $π$-mode. By using real- and Fourier-space leakage radiation microscopy in combination with edge- and bulk excitation, we unequivocally identify the anomalous Floquet topological $π$-mode and study its frequency dependence.
