论文标题
模拟旋转蜂窝光子晶体中Fano共振的拓扑鲁棒性
Simulating Topological Robustness of Fano Resonance in Rotated Honeycomb Photonic Crystals
论文作者
论文摘要
具有独特的超偏见，不对称线形状和高质量因子Q的FANO共振是一种广泛发生的现象，具有各种光学，等离子和微波炉的表现。在本文中，我们探讨了FANO共振模式的特征性鲁棒性，该模式受到与C_6点组对称性相关的二维蜂窝光子晶体（HPC）的镜像对称性引起的制造带反演的保护。因此，黑暗而明亮的拓扑边缘模式出现在dirac锥的开放式带隙中。黑暗和明亮模式的破坏性和建设性干扰导致Fano共振的不对称线形状。对环境和几何扰动非常敏感的FANO共振模式可以应用于传感器设计。在这里，我们证明，拓扑Fano共振模式在存在疾病，缺陷和空腔的情况下保留其不对称的超呈线形状，并且具有有用的光学设备应用，例如低阈值激光器和极为精确的干涉仪。
The Fano resonance with a distinctive ultra-sharp, asymmetric line shape and high quality factor Q, is a widely occurring phenomena that has a large variety of optical, plasmonic and microwave manifestations. In this paper, we explore the characteristic robustness of the Fano resonance mode, which is topologically protected by manufacturing band inversion induced by breaking the mirror symmetry of a two-dimensional honeycomb photonic crystal (HPC), associated with C_6 point group symmetry. So the dark and bright topological edge modes appear in the band gap made by opening of the Dirac cone. Destructive and constructive interference of the dark and bright modes leads to the asymmetric line shape of the Fano resonance. The Fano resonance mode which is very sensitive to the environmental and geometrical perturbations, can be applied to sensor design. Here we demonstrate that the topological Fano resonance mode preserves its asymmetric, ultra-sharp line shape in the presence of the disorder, defects and cavities, and this has useful optical device applications such as in low threshold lasers, and extremely precise interferometers
