论文标题
频率依赖性拓扑阶段和谷光子晶体中的光子绕道
Frequency-dependent topological phases and photonic detouring in valley photonic crystals
论文作者
论文摘要
在这里，将自由度的频率程度引入具有双带隙的谷光子晶体中。基于高阶平面波扩展模型，我们得出了一种有效的哈密顿量，该模型表征了双带隙。金属谷光子晶体被证明是发现所有四个拓扑阶段的例子。在拓扑不同的谷光子晶体之间的域壁上，证明了频率依赖性边缘状态，并提出了宽带光子绕道。我们的发现为设计拓扑结构的频率属性提供了指导，并显示了其在波长划分多路复用器中的潜在应用。
Here, the frequency degree of freedom is introduced into valley photonic crystals with dual band gaps. Based on the high-order plane wave expansion model, we derive an effective Hamiltonian which characterizes dual band gaps. Metallic valley photonic crystals are demonstrated as examples in which all four topological phases are found. At the domain walls between topologically distinct valley photonic crystals, frequency-dependent edge states are demonstrated and a broadband photonic detouring is proposed. Our findings provide the guidance for designing the frequency-dependent property of topological structures and show its potential applications in wavelength division multiplexers.
