简并能级
退化(生物学)
物理
极化(电化学)
厄米矩阵
光子晶体
参数空间
奇点
空格(标点符号)
位置和动量空间
电子能带结构
光子学
对称(几何)
拓扑简并
拓扑(电路)
量子力学
理论物理学
数学
几何学
拓扑序
量子
计算机科学
组合数学
物理化学
操作系统
对称保护拓扑序
化学
生物
生物信息学
作者
Olivia Y. Long,Cheng Guo,Shanhui Fan
出处
期刊:Physical review applied
[American Physical Society]
日期:2023-11-30
卷期号:20 (5)
标识
DOI:10.1103/physrevapplied.20.l051001
摘要
Band degeneracies at high-symmetry points in wavevector space have been shown to exhibit rich physical phenomena in photonics, but obtaining degenerate bands away from such points is highly nontrivial. This work demonstrates complex band degeneracy in a photonic crystal structure over a region of momentum space. The authors show that this band degeneracy corresponds to polarization-independent transmission and manifests as a topological singularity in the structural parameter space of the system. Such degeneracy can be harnessed for the design of nonlocal polarization-independent photonic structures.
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