Topological supermodes in photonic crystal fiber.
Topological supermodes in photonic crystal fiber.
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DOI:
10.1126/sciadv.add3522
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发表时间:
2022-12-21
期刊:
影响因子:
13.6
通讯作者:
中科院分区:
文献类型:
--
作者:
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 fiber. We demonstrate, through both modeling and experiment, optical fiber that hosts topological supermodes across multiple light-guiding cores. We directly measure the photonic winding number invariant characterizing the bulk and observe topological guidance of visible light over meter length scales. Furthermore, the mechanical flexibility of fiber allows us to reversibly reconfigure the topological state. As the fiber is bent, we find that the edge states first lose their localization and then become relocalized because of disorder. We envision fiber as a scalable platform to explore and exploit topological effects in photonic networks. Topological photonics is used to design robust modes of light inside structured optical fibre.
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