论文标题
带有光子晶体纳米梁腔的裁缝拓扑边缘状态
Tailoring Topological Edge States with Photonic Crystal Nanobeam Cavities
论文作者
论文摘要
光子系统中拓扑边缘状态（TESS）的实现为操纵新颖的举止提供了前所未有的机会。 Su-Schrieffer-Heeger（SSH）模型最近引起了人们的重大关注，并已在各种光子平台中被利用以创建苔丝。我们基于SSH光子晶体纳米筒腔制定光子拓扑绝缘子策略。与一维晶格中基于交替调整的耦合强度的常规光子SSH方案相反，我们的建议提供了更高的灵活性，并允许以二维方式操纵模式耦合来调整苔丝。我们揭示了介电膜中提出的基于孔阵列的纳米梁可以通过控制垂直和水平方向的相邻SSH纳米梁的耦合强度来选择性地量身定制电信区域中的单或双苔丝。我们的发现提供了对SSH模型的深入理解，并允许在利用SSH模型中为具有独特属性和功能的集成拓扑光子设备开发SSH模型。
The realization of topological edge states (TESs) in photonic systems has provided unprecedented opportunities for manipulating light in novel manners. The Su-Schrieffer-Heeger (SSH) model has recently gained significant attention and has been exploited in a wide range of photonic platforms to create TESs. We develop a photonic topological insulator strategy based on SSH photonic crystal nanobeam cavities. In contrast to the conventional photonic SSH schemes which are based on alternately tuned coupling strength in one-dimensional lattice, our proposal provides higher flexibility and allows tailoring TESs by manipulating mode coupling in a two-dimensional manner. We reveal that the proposed hole-array based nanobeams in a dielectric membrane can selectively tailor single or double TESs in the telecommunication region by controlling the coupling strength of the adjacent SSH nanobeams in both vertical and horizontal directions. Our finding provides an in-depth understanding of the SSH model, and allows an additional degree of freedom in exploiting the SSH model for integrated topological photonic devices with unique properties and functionalities.
