浙江大学戴道锌团队研究了全片可重构生成标量和矢量轨道角动量光束。该研究于2025年6月30日发表在《光：科学与应用》杂志上。

携带角动量的结构光，如自旋角动量（SAM）和轨道角动量（OAM），一直是新科学和应用的核心，推动了对紧凑型片上光源的需求。虽然已经演示了许多静态片上解决方案，以及片上自由空间模式的源，但到目前为止，还没有一种架构可以在所有角动量状态和所有片上完全重新配置。研究组报道了第一个用于创建标量和矢量角动量束的全芯片结构光发生器，该发生器通过带有硅模多路复用器（硅芯片）的绝缘体上硅（SOI）芯片实现。 

他们选择性地激发二氧化硅多模总线波导的六种线偏振（LP）模式，用SOI芯片精确控制模式功率和相位。这使研究组能够定制模式集的任意叠加，从而合成常见的圆柱形矢量涡旋光束以及受控自旋和拓扑电荷的OAM光束。该紧凑型结构光发生器具有高开关速度，可在电信频带内运行，为光通信和集成量子技术等应用铺平了道路。

附：英文原文

Title: All-on-chip reconfigurable generation of scalar and vectorial orbital angular momentum beams

Author: Zhao, Weike, Yi, Xiaolin, Huang, Jieshan, Liu, Ruoran, Wang, Jianwei, Shi, Yaocheng, Ma, Yungui, Forbes, Andrew, Dai, Daoxin

Issue&Volume: 2025-06-30

Abstract: Structured light carrying angular momentum, such as spin angular momentum (SAM) and orbital angular momentum (OAM), has been at the core of new science and applications, driving the need for compact on-chip sources. While many static on-chip solutions have been demonstrated, as well as on-chip sources of free-space modes, no architecture that is fully reconfigurable in all angular momentum states and all on-chip has so far been possible. Here we report the first all-on-chip structured light generator for the creation of both scalar and vectorial angular momentum beams, facilitated through a silicon-on-insulator (SOI) chip with a silica mode multiplexer (silica chip). We selectively stimulate six linearly-polarized (LP) modes of the silica multimode bus waveguide, precisely controlling the modal powers and phases with the SOI chip. This allows us to tailor arbitrary superpositions of the mode set thus synthesizing common cylindrical vector vortex beams as well as OAM beams of controlled spin and topological charge. Our compact structured light generator exhibits high switching speed and operates across the telecom band, paving the way for applications such as optical communication and integrated quantum technologies.

DOI: 10.1038/s41377-025-01899-7

Source: https://www.nature.com/articles/s41377-025-01899-7