论文标题
具有负指数介质的光子晶体中受对称保护的特殊环
A symmetry-protected exceptional ring in a photonic crystal with negative index media
论文作者
论文摘要
非热拓扑带结构（例如受对称保护的特殊环（SPER））可以出现使用Hermitian矩阵的广义特征值问题（GEVP）所描述的系统。在本文中，我们通过数值分析具有负指数介质的光子晶体，该光子晶体由GEVP用遗传学矩阵描述。我们使用comsol多物理学的分析表明，由分裂环的谐振器和金属线结构组成的光子晶体出现了蜘蛛。我们期望在实验中观察到上述蜘蛛，因为它以有限的频率出现。
Non-Hermitian topological band structures such as symmetry-protected exceptional rings (SPERs) can emerge for systems described by the generalized eigenvalue problem (GEVP) with Hermitian matrices. In this paper, we numerically analyze a photonic crystal with negative index media, which is described by the GEVP with Hermitian matrices. Our analysis using COMSOL Multiphysics demonstrates that a SPER emerges for photonic crystals composed of split-ring resonators and metal-wire structures. We expect that the above SPER can be observed in experiments as it emerges at a finite frequency.
