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光子Floquet拓绝缘体的拓绝缘体

Mikael C Rechtsman¹, Julia M Zeuner, Yonatan Plotnik

¹Department of Physics and the Solid State Institute, Technion - Israel Institute of Technology, Haifa 32000, Israel. mcrworld@gmail.com

|April 13, 2013

概括

我们展示了一种新型的可见光光子拓绝缘体. 这个设备使用蜂巢网格中的螺旋波导来创建无磁场的无散射边缘状态.

科学领域:

光子学是一个光子学.
凝聚物质物理学凝聚物质物理学
材料科学材料科学材料科学

背景情况:

拓绝缘体是具有独特导电表面的材料.
对光子拓绝缘体的现有方法通常依赖磁场,这对于光学频率来说是不切实际的.
之前对光学拓绝缘体的尝试未能实现无散射边缘传输.

研究的目的:

提出并实验证明一种新的光子拓绝缘体.
为了实现可见光的拓保护,无散射边缘传输.
为光学拓绝缘体开发一种无磁场的机制.

主要方法:

使用一系列在蜂巢安排中 evanescently 合的螺旋波导构建了一个光子网格.
利用偏轴衍射方程,其中传播坐标作为"时间",以建模光的行为.
引入了波导螺旋体,以打破z逆对称,模仿Floquet拓绝缘体.

主要成果:

成功演示了一种光子拓绝缘体,它在可见光下运行.
观察到的单向边缘状态在拓上被保护免受散射.
该系统在不需要外部磁场的情况下运行.

结论:

拟议的螺旋波导网格为无磁场的光子拓绝缘体提供了一个可行的平台.
这项工作为强大的光学传输和量子信息处理的应用开辟了道路.
展示的系统实现了无散射边缘传输,这是实际的拓光子设备的关键性质.

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