波导管
谐振器
光子学
联轴节(管道)
光子晶体
拓扑(电路)
光学
格子(音乐)
光电子学
激发
导模共振
拓扑绝缘体
物理
材料科学
凝聚态物理
工程类
量子力学
电气工程
声学
衍射光栅
衍射
冶金
作者
Yong‐Feng Gao,Yue He,Jing‐Qi Si,Subinuer Rouzi,Meng‐Cheng Jin,Yi‐Han He,Ming Yang
标识
DOI:10.1002/qute.202300265
摘要
Abstract In recent years, the topological edge states (TESs) and topological corner states (TCSs) based on high‐order topological photonic insulators have been researched and applied in various fields. Among them, the combination of topological photonics and waveguide–cavity coupling system has attracted much attention of researchers. In this paper, TESs and TCSs based on Kagome lattice photonic crystals (PCs) with rectangular dielectric columns are obtained. In addition, a topological waveguide–cavity coupling system is proposed, realizing the energy coupling between the TES waveguide and the TCS cavity. To further improve the performance of the system, a sandwich‐like waveguide and an extended waveguide are used to replace the original TES waveguide. Interestingly, the proposed extended waveguide–cavity coupling system cannot only achieve the excitation of two TCSs at different frequencies, but also has stronger electric field intensity, narrower resonance bandwidth, and higher quality factor than the other structures. This work provides a new path to design high‐performance micro‐nanointegrated optical devices such as filters, lasers, and resonators.
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