Though topologically protected one-way edge states are determined by the bulk mode of the magnetic photonic crystal (MPC), the edge profile can influence topological edge states and associated wave propagation since the waves at the states are localized at the edge of the photonic crystal. By truncating the honeycomb structured MPC at the same side but at different cuts, we show the MPC slab will present different topological edge band, and the associate transmission of a one-way surface wave will change a lot. We demonstrate the good transmission efficiency of the one-way surface wave needs a good field localization at the edge of MPC at the topological edge states, and bearded edge has better field localization ability than the zigzag one in a wider frequency range. In addition to the different cuts, one can modify the topological edge state by tuning the radius of outmost rods of the slab or the material parameters of the rods, which does not affect the topological state of t...

中文翻译：

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通过旋磁光子晶体的表面形态调节手性边缘态和单向透射

尽管受拓扑保护的单向边缘状态由磁光子晶体（MPC）的体模确定，但边缘轮廓可能会影响拓扑边缘状态和相关的波传播，因为这些状态下的波位于光子晶体的边缘。通过在同一侧但在不同的切口处截断蜂窝状MPC，我们显示MPC平板将呈现不同的拓扑边带，并且单向表面波的伴随传输将发生很大变化。我们证明了单向面波的良好传输效率需要在拓扑边缘状态下的MPC边缘处进行良好的场定位，并且在较宽的频率范围内，胡须边缘比之字形具有更好的场定位能力。除了削减幅度之外，