Nonreciprocal Photonics Without Magneto-Optics
Nonreciprocal Photonics Without Magneto-Optics
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DOI：
10.1109/lawp.2018.2856258
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发表时间：
2018-11-01
影响因子：
4.2
通讯作者：
Lin, Qian
中科院分区：
文献类型：
--
作者：
Fan, Shanhui;Shi, Yu;Lin, Qian
光隔离器打破了洛伦兹互易，是调节光流的基本构件。在这里，我们简要介绍了构建光隔离器的非磁性方法的发展。我们发现非线性光隔离器从根本上受到动态互易的约束，不能完全再现标准磁光器件的功能。我们还表明，完全的光学隔离是可以实现的动态调制的折射率。此外，调制系统中的往复破缺与光子有效规范势的概念密切相关。这种规范电位的使用为新的非互易拓扑光子学物理学以及控制电磁波传播的新能力指明了一条道路。
Optical isolators, which break the Lorentz reciprocity, are fundamental building blocks for regulating the flow of light. Here, we provide a brief perspective on the developments in nonmagnetic approaches to constructing optical isolators. We show that nonlinear optical isolators are fundamentally constrained by dynamic reciprocity and cannot completely reproduce functionalities of standard magneto-optical devices. We also show that complete optical isolation is achievable with dynamic modulation of refractive index. Moreover, the reciprocity-breaking in modulated systems is closely related to the concept of an effective gauge potential for photons. The use of such gauge potential points to a route toward novel nonreciprocal topological photonics physics as well as new capabilities for controlling the propagation of electromagnetic waves.