AI 中文总结
该研究将硅非局域惠更斯超表面原位集成到多模光纤端面，无需预补偿即可将散斑图案转为涡旋光束，提升了抗光纤扰动的鲁棒性，为多模光纤结构光应用提供了紧凑平台。
AI 中文摘要
多模光纤（MMF）集成光子学的一个基本障碍是实现抗光纤扰动的鲁棒且确定的波前整形，光纤扰动会引发随机模式干涉，将实空间输出扰乱为散斑图案。现有波前整形方法通常依赖像素化相位或偏振预补偿，使其对光纤变形高度敏感。本文展示，将硅非局域超表面原位集成到MMF端面上，可在无预补偿的情况下将任意散斑图案直接转换为光学涡旋光束。该超表面支持重叠的米氏共振与非局域连续域束缚态（BICs），通过满足广义非局域惠更斯条件产生高透射带。通过MMF模式与具有拓扑偏振涡旋特性的惠更斯-BICs之间的动量空间耦合，输出在静态和动态扰动下均保持环形轮廓，表现出对光纤变形的卓越鲁棒性。该方法为MMF中用于内窥镜、光捕获和通信的鲁棒结构光产生提供了紧凑、对准容差高的平台。
英文摘要
A fundamental hurdle for multimode fiber (MMF) integrated photonics is achieving robust and deterministic wavefront shaping against fiber perturbation, which induces random modal interference and scrambles the real-space output into speckle patterns. Existing wavefront shaping methods typically rely on pixelated phase or polarization pre-compensation, rendering them highly sensitive to fiber deformation. Here, we show that in-situ integration of a silicon nonlocal metasurface onto an MMF end facet enables direct conversion of arbitrary speckle patterns into optical vortex beams without pre-compensation. The metasurface supports overlapped Mie resonances and nonlocal bound states in the continuum (BICs), yielding high-transmission bands by satisfying the generalized nonlocal Huygens condition. Through momentum-space coupling between MMF modes and Huygens-BICs with topological polarization-vortex nature, the output maintains doughnut-shaped profiles under static and dynamic perturbations, demonstrating exceptional robustness against fiber deformation. This approach provides a compact, alignment-tolerant platform for robust structured light generation in MMFs for endoscopy, optical trapping and communications.
