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非线性诱导的光子拓绝缘体

Lukas J Maczewsky¹, Matthias Heinrich¹, Mark Kremer¹

¹Institut für Physik, Universität Rostock, Albert-Einstein-Str. 23, 18059 Rostock, Germany.

Science (New York, N.Y.)

|November 6, 2020

概括

我们证明光学非线性可以诱导光子系统的拓相. 这种过渡创建了一个受保护的边缘传输通道,使得可按需控制拓特征.

科学领域:

光子学
凝聚物质物理学
非线性光学

背景情况:

拓绝缘体表现出强大的边缘传输,防止缺陷和混乱.
传统的拓相通常是线性和静态的.

研究的目的:

展示一个非线性诱导拓相的拓系统.
在非线性系统中探索拓性质的控制.

主要方法:

使用具有特定格子结构的光子平台.
研究系统在线性和非线性光学模式中的行为.
分析由光学功率驱动的拓上非平凡相的过渡.

主要成果:

在线状态下,光子网在拓上是微不足道的.
在功率值以上,光学非线性将系统推向拓学上非平凡的阶段.
在此过渡过程中,一个保护的,单向的边缘传输通道暂时出现.

结论:

光学非线性可以动态诱导拓相.
这为开发可控,紧的拓设备提供了途径.
这些发现为研究非线性系统的拓性质开辟了新的途径.

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