We theoretically investigated the localization and switching properties of surface waves that appear at the interface between the homogeneous medium and a semi-infinite one-dimensional photonic crystal in the presence of chiral metamaterial as a cap layer, using the transfer matrix method. The one-dimensional photonic crystal is made of alternating layers of right-handed and dispersive left-handed materials, and both forward and backward surface waves were appeared in this structure. It was demonstrated that the chirality parameter of the cap layer plays a significant role in tuning the type (changing forward to backward and vice versa) and localization of surface waves with transverse electric polarization. We believe that our results provide a useful way for a deeper understanding of the properties of surface waves in photonic devices and metamaterial systems.

我们使用转移矩阵方法，在手性超材料作为盖层存在的情况下，从理论上研究了在均质介质和半无限一维光子晶体之间的界面处出现的表面波的定位和转换特性。一维光子晶体由右手和分散的左手材料的交替层组成，并且在此结构中同时出现了正向和反向表面波。结果表明，盖层的手性参数在调节类型（向前改变，向后改变，反之亦然）和具有横向极化作用的表面波局部化方面起着重要作用。