Opt Lett. 2018 Jul 15;43(14):3216-3219. doi: 10.1364/OL.43.003216.
A very facile way to obtain multiple interface modes in a one-dimensional photonic crystal heterostructure is proposed in this Letter. We found that the interface modes can be generated by introducing the interfaces, and the number of interface modes equals the number of introduced interfaces. All these interface modes originating from a different geometric Zak phase can create two band branches governed by the two different interfaces. We further find that the two band branches can be renormalized into one band branch with discrete energy levels in the form of sinusoidal function. We believe that these findings can be used to provide direct guidance for practical application and can also make the estimation of practical samples more convenient.
本文提出了一种在一维光子晶体异质结构中获得多种界面模式的简便方法。我们发现通过引入界面可以产生界面模式，且界面模式的数量与引入的界面数量相等。所有这些源自不同几何 Zak 相位的界面模式可以产生由两个不同界面控制的两个带分支。我们进一步发现，两个带分支可以通过正弦函数的形式重整化成一个具有离散能级的带分支。我们相信这些发现可以为实际应用提供直接的指导，也可以使对实际样品的估计更加方便。
