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通过1D网格中的单子形成对拓终端状态的光学控制
Christina Jörg1,2, Marius Jürgensen1,3, Sebabrata Mukherjee1,4
1Department of Physics, The Pennsylvania State University, University Park, PA 16802, USA.
Nanophotonics (Berlin, Germany)
|April 4, 2025
概括
研究人员通过光学诱导和控制在Su-Schrieffer-Heeger网格中的拓终端状态,使用离散的空间单元. 这种全光学控制是通过在特定功率值以上的非线性分叉实现的.
科学领域:
- 非线性光学是一种非线性光学.
- 凝聚物质物理学 凝聚物质物理学
- 摄影系统是光子系统.
背景情况:
- 离散空间单子是非线性介质中稳定的光传播解决方案.
- 拓状态提供独特的特性,但通常需要复杂的制造或外部控制.
- Su-Schrieffer-Heeger (SSH) 格子是具有明显边缘状态的拓绝缘体的模型.
研究的目的:
- 研究拓终极状态的全光学感应和控制.
- 利用离散的空间单子来操纵光子系统中的拓性质.
- 探索非线性光学现象,以主动控制拓状态.
主要方法:
- 使用 evanescently-coupled 波导阵列来模拟一个Su-Schrieffer-Heeger格子.
- 利用探头技术观察单子形成及其影响.
- 分析了包括分叉在内的非线性光学效应,以了解状态过渡.
主要成果:
- 在波导阵列内演示了离散空间单子的形成.
- 在批量中观察到线性拓末端状态的光学感应.
- 确定了非线性分叉和电源值,用于突然过渡到拓状态.
结论:
- 索利顿形成为拓状态的全光学控制提供了一种机制.
- 可以利用非线性光学效应来积极切换拓性质.
- 这项工作为光子平台中拓现象的动态控制开辟了道路.
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