通过叠加技术实现矢量光束的起源：几何相位
Origin of Experimental Realization of Vector Beams by Superposition Technique: Geometric Phase
AI总结：
本研究揭示了矢量光束的偏振分布并非固有属性，而是由光学器件引入的几何相位差在表征过程中产生的
摘要：
基于叠加技术的光学矢量光束生成[Phys. Rev. Lett. 107(5), 053601 (2011)]由于其简单性和成本效益，在基础光学和应用光学中引起了广泛关注。在该方法中，叠加的模式存在于正交的偏振态中，因此不会相互干涉。当使用光学器件进行表征时，相应的偏振分布可以被观测到。在本工作中，我们报告说矢量光束的特征（非均匀）偏振分布并不固有存在于其场分布中。相反，观测到的偏振特征是在表征过程中由于光学器件在叠加模式之间引入的几何相位差而产生的。这一分析为理解各种类型的矢量光束开辟了新方向，并在结构光领域提供了潜在的进展。
英文摘要：
Optical vector beam generation based on the superposition technique [Phys. Rev. Lett. 107(5), 053601 (2011)] has attracted significant interest in both fundamental and applied optics due to its simplicity and cost-effectiveness. In this approach, the superposed modes exist in orthogonal polarization states and therefore do not interfere with each other. When optical gadgets are employed for characterization, the corresponding polarization distribution can be observed. In this work, we report that the characteristic (non-uniform) polarization distribution of vector beams is not inherently present in their field distribution. Instead, the observed polarization features arise during characterization as a consequence of the geometric phase difference introduced between the superposed modes by the optical gadgets. This analysis opens a new direction in the understanding of various classes of vector beams and offers potential advances in the field of structured beam optics.
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