Gao Wensheng, Xiao Meng, Chen Baojie, Pun Edwin Y B, Chan C T, Tam Wing Yim
Opt Lett. 2017 Apr 15;42(8):1500-1503. doi: 10.1364/OL.42.001500.
There is no known simple rule that assures the existence of interface states in photonic crystals (PCs). We show here that one can control the existence or absence of interface states in 1D PCs through engineering the bulk geometrical phase such that interface states can be guaranteed in some or all photonic bandgaps. We verify experimentally the interface state design paradigm in 1D multilayered PCs fabricated by electron beam vapor deposition. We obtain the geometrical phases by measuring the reflection phases at the bandgaps of the PCs and achieve good agreement with the theory. Our approach could provide a platform for generating a PC interface state for various applications.
目前尚无已知的简单规则能确保光子晶体（PCs）中界面态的存在。我们在此表明，通过设计体几何相位，可以控制一维光子晶体中界面态的有无，从而在某些或所有光子带隙中保证界面态的存在。我们通过实验验证了用电子束蒸镀法制备的一维多层光子晶体中的界面态设计范式。我们通过测量光子晶体带隙处的反射相位来获得几何相位，并与理论取得了良好的一致性。我们的方法可为各种应用生成光子晶体界面态提供一个平台。
