在蜂巢光子晶片连续体中的迪拉克结合状态
Ruey-Lin Chern1, Yi-Chi Kao2, Robert R Hwang3
1Institute of Applied Mechanics, National Taiwan University, Taipei, 106, Taiwan. chernrl@ntu.edu.tw.
Scientific reports
|January 27, 2026
概括
我们在介电光子晶片中发现了连续体中的对称性保护绑定状态 (BICs). 这些BIC在迪拉克点上表现出高质量因子和拓性质,在光学设备中具有潜在的应用.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 光子学和光学 在光子学和光学.
- 材料科学 材料科学 材料科学
背景情况:
- 连续体中的受限状态 (BICs) 是具有无限质量因子的独特光学状态,被限制在辐射连续体内.
- 具有特定对称性的光子晶片为实现像BIC这样的奇异现象提供了一个平台.
- 光子带结构中的迪拉克点与石墨烯中的类似,导致独特的分散关系.
研究的目的:
- 在介电光子晶体板中的双迪拉克点研究BIC的存在和特性.
- 分析这些BIC的对称性保护和拓特性.
- 探索对称性破坏对迪拉克BIC和相关的极化奇点的影响.
主要方法:
- 介电光子晶体板的理论研究,具有三角孔的蜂格子.
- 在Brillouin区域中心对带结构和对称性属性的分析.
- 识别BIC作为具有拓电荷的对称性保护极化奇点 (V点).
主要成果:
- 在光子晶片中的四倍退化的双迪拉克点发现了对称性保护的BIC.
- 这些BIC的特征是具有±1的拓电荷的高阶V点,受到[公式:参见文本]对称的保护.
- 证明打破[公式:参见文本]对称性将迪拉克BIC转化为由循环极化状态 (C点) 包围的低级V点.
结论:
- 对称强制条件使光子晶体中的迪拉克点能够形成强大的,高质量的BIC.
- 这些BIC的拓性质与它们的极化奇点特性和对称性保护有关.
- 定制光子晶体的对称性提供了一条控制BIC属性的途径,并创建新的光学状态.
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