论文标题
光子晶体纤维中的拓扑超模型
Topological supermodes in photonic crystal fiber
论文作者
论文摘要
拓扑状态通过与光，声音或电子的传输息息相关，可以通过整数不变的整数在富裕的介质中实现强大的运输。但是，挑战仍然是利用长度尺度平台（例如光纤）的拓扑保护。通过建模和实验，我们证明了光纤，该光纤构成了多个轻型引导核心的拓扑超模型。我们直接测量了表征大体的光子绕组数量不变式，并观察到仪表长度尺度上可见光的拓扑指导。此外，纤维的机械灵活性使我们能够可逆地重新配置拓扑状态。由于纤维弯曲，我们发现边缘状态首先失去其本地化，然后由于无序而重新定位。我们设想纤维作为探索和利用光子网络中拓扑效应的可扩展平台。
Topological states enable robust transport within disorder-rich media through integer invariants inextricably tied to the transmission of light, sound, or electrons. However, the challenge remains to exploit topological protection in a length-scalable platform such as optical fibre. We demonstrate, through both modelling and experiment, optical fibre that hosts topological supermodes across multiple light-guiding cores. We directly measure the photonic winding-number invariant characterising the bulk and observe topological guidance of visible light over metre length scales. Furthermore, the mechanical flexibility of fibre allows us to reversibly reconfigure the topological state. As the fibre is bent, we find that the edge states first lose their localization and then become relocalised due to disorder. We envision fibre as a scalable platform to explore and exploit topological effects in photonic networks.
