Vogliardi Andrea, Ruffato Gianluca, Bonaldo Daniele, Dal Zilio Simone, Romanato Filippo
Department of Physics and Astronomy 'G. Galilei', University of Padova, Padova, Italy.
Padua Quantum Technology Research Center 'QTech', University of Padova, Padova, Italy.
Light Sci Appl. 2025 May 6;14(1):183. doi: 10.1038/s41377-025-01859-1.
Perfect vortices, recognized for their distinct ring profile that remains independent of the topological charge, present significant challenges in generation due to the precise control needed over both phase and polarization. In this work, we introduce and validate a new approach for generating these beams, allowing the selection of different azimuthally-variant phase gradients and vector states, thereby enabling full control over the phase and polarization patterns of perfect vortices. Using dual-functional silicon metaoptics, we achieve the compact generation of a novel class of perfect vortices, termed azimuthally-variant perfect vector beams. The optical characterization of the generated beams, performed through a filtering method, confirms their intrinsic azimuthally-variant vectorial nature. These beams exhibit unique properties that promise valuable applications in optical tweezing, the manipulation of low-refractive-index particles, the trapping of cold atoms, and high-capacity communications.
完美涡旋因其独特的环形轮廓而被识别，该轮廓与拓扑电荷无关，但由于需要对相位和偏振进行精确控制，其产生面临重大挑战。在这项工作中，我们介绍并验证了一种产生这些光束的新方法，该方法允许选择不同的方位角变化相位梯度和矢量状态，从而能够完全控制完美涡旋的相位和偏振模式。使用双功能硅超光学器件，我们实现了一类新型完美涡旋（称为方位角变化完美矢量光束）的紧凑产生。通过滤波方法对所产生光束进行的光学表征证实了它们固有的方位角变化矢量性质。这些光束展现出独特的特性，有望在光镊、低折射率粒子的操纵、冷原子的捕获以及高容量通信等方面得到有价值的应用。
