【摘要】 阵列涡旋的空间扩展受到限制，实际可用的轨道角动量（OAM）本征态数量有限。为突破这一限制，将广义聚焦相位与圆形域函数集成进涡旋相位设计，制备出基于α-Si纳米天线的涡旋相位超表面，在实验上实现同心广义完美涡旋光束（G-PVBs）。这一设计打破了传统涡旋光对称形状的限制，光束图案和螺旋干涉图中的不同涡旋形状和螺旋瓣都以非重叠的同心方式排列。该方案实现了涡旋光形状、拓扑荷、涡旋光数目和偏振的解耦合，同时每个涡旋光束携带稳定的拓扑荷信息及涡旋形状信息，有效避免了模间串扰。通过这种紧凑的同心排列方式，可实现完美涡旋光束的空间复用、偏振复用和OAM模式复用，拓展涡旋光通信信道和信息维度，为高容量的加密涡旋光通信提供广阔的应用前景。更多还原

【Abstract】 Due to the spatial constraint of arrayed vortex beams, the number of practically applicable orbital angular momentum(OAM) eigenstates remains finite. To address this limitation, this paper incorporates the generalized focusing phase and circular domain function into the vortex phase design, fabricating a vortex phase metasurface based on α-Si nanoantennas. The experimental results demonstrate the successful generation of concentric generalized perfect vortex beams(G-PVBs). This novel design transcends the constraint of conventional vortex beam symmetry, featuring distinct vortex shapes and spiral lobes in the beam pattern, with spiral interference patterns arranged concentrically without overlap. The approach effectively decouples the shape, topological charge, number of vortex beams, and polarization characteristics. Each vortex beam maintains stable topological charge and shape information, successfully preventing intermodal crosstalk. Through this efficient concentric configuration, this research achieves spatial multiplexing, polarization multiplexing, and OAM mode multiplexing of perfect vortex beams. This advancement expands the communication channels and information dimensions in vortex beam communications, offering significant potential for highcapacity encrypted vortex beam communication systems.更多还原