在共振光子晶衍射中拓极化缺陷的起源和保存
Xuefan Yin1, Takuya Inoue1, Chao Peng2,3
1Department of Electronic Science and Engineering, Kyoto University, Kyoto-Daigaku-Katsura, Nishikyo-ku, Kyoto, 615-8510, Japan.
Nanophotonics (Berlin, Germany)
|January 22, 2025
概括
我们引入了拓电荷的新定义,以分析光子晶片中的偏振缺陷. 这些缺陷是由模式交叉和对称性破坏引起的,在动量空间中遵守局部保存定律.
科学领域:
- 光子学是指光子学的使用方法.
- 凝聚物质物理学 凝聚物质物理学
- 晶体学 晶体学是指结晶学.
背景情况:
- 极化缺陷对于理解光子结构中的光物质相互作用至关重要.
- 目前对拓电荷的定义仅限于对光子晶片的应用.
研究的目的:
- 介绍一下对极化缺陷的拓电荷的概括定义.
- 为了调查这些缺陷的起源和保存规律,在布里卢恩地区.
主要方法:
- 拓电荷的连续性定义的开发.
- 分析光子晶片中的偏振缺陷,考虑辐射和 evanescent 模式.
- 在整个Brillouin地区进行调查.
主要成果:
- 概括的定义成功地描绘了所有共振衍射顺序上的极化缺陷.
- 由于Brillouin区域折叠而导致的模式交叉被确定为极化缺陷的关键来源.
- 极化缺陷源于自发的对称性破坏或带间合.
- 缺陷在不受约束的动量空间中进化,并遵守当地的保存规律.
结论:
- 新的定义为研究极化缺陷提供了一个全面的框架.
- 了解缺陷的起源和保存对于设计先进的光子设备至关重要.
- 当地保护的概念为光子晶体中的拓现象提供了新的见解.
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