用于超快光纤激光器的即插即用等离子体元光纤
Plug-Play Plasmonic Metafibers for Ultrafast Fiber Lasers
摘要：
通过在光纤尖端集成超表面，超光纤将传统光纤的功能扩展到前所未有的纳米级光操纵，成为纳米科学和纤维光学社区的新兴光耦合平台。目前的元光纤主要是探索孤立的裸光纤，由于缺乏与通用光纤网络的标准接口，因此仍然是概念验证。在这里，我们开发了新的方法来制造定义良好的等离子体超颖表面直接在商业单模光纤跳线使用标准的平面技术的端面上，并提供了第一个演示其实际应用中的非线性光学制度。具有即插即用连接光纤电路和任意超表面景观，与可调谐等离子体共振的超光纤实现到光纤激光器腔，产生全光纤亚皮秒（最小513 fs）孤子锁模激光器在1.5微米和2微米的光波长，展示其不寻常的偏振非线性传递函数和优越的饱和吸收响应。等离子体超颖表面的饱和吸收背后的物理机制提供了新的见解。纳米纤维工艺流程与现有的洁净室技术兼容，为超纤维成为功能化纤维组分的常规成员提供了途径。这项工作为下一代超快光纤激光器、光学频率梳、光学神经网络和用于传感、成像、通信等的超紧凑“全光纤”光学系统铺平了道路。
英文摘要：
Metafibers expand the functionalities of conventional optical fibers to unprecedented nanoscale light manipulations by integrating metasurfaces on the fiber tips, becoming an emerging light-coupling platform for both nanoscience and fiber optics communities. Mostly exploring the isolated bare fibers, current metafibers remain as proof-of-concept demonstrations due to a lack of standard interfaces with the universal fiber networks. Here, we develop new methodologies to fabricate well-defined plasmonic metasurfaces directly on the end facets of commercial single mode fiber jumpers using standard planar technologies and provide a first demonstration of their practical applications in the nonlinear optics regime. Featuring plug-play connections with fiber circuitry and arbitrary metasurfaces landscapes, the metafibers with tunable plasmonic resonances are implemented into fiber laser cavities, yielding all-fiber sub-picosecond (minimum 513 fs) soliton mode locked lasers at optical wavelengths of 1.5 micrometer and 2 micrometer, demonstrating their unusual polarimetric nonlinear transfer functions and superior saturation absorption responses. Novel insights into the physical mechanisms behind the saturable absorption of plasmonic metasurfaces are provided. The nanofabrication process flow is compatible with existing cleanroom technologies, offering metafibers an avenue to be a regular member of functionalized fiber components. The work paves the way towards next generation of ultrafast fiber lasers, optical frequency combs, optical neural networks and ultracompact "all-in-fibers" optical systems for sensing, imaging, communications, and many others.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
