Integrating multiple functionalities into one single device is of great importance for ever-growing demand of photonic device. Optical vortex beam contains orbital angular momentum (OAM) and spin angular momentum (SAM) associated with phase and polarization singularities respectively, which has contributed to various application including optical manipulation, optical trapping and high-speed optical communication. Traditional methods to detect its phase and polarization mostly focus on the functionality of single dimensional optical field. However, quite different from the previous reports, we here propose a novel approach to measure the phase and polarization state based on the full use of near and far-field light functionalities in one single metadevice, which supports spin-controlled surface plasmon polaritons (SPPs) and topological charge-dependent focus spot position. On the one hand, this design makes the most of multidimensional field optical scattering characteristics to rich the functions of metadevice. On the other hand, it provides a novel concept to recognize various angular momentum information of vortex beam. We believe that such design will have great potential for the integration of different sub-wavelength optical components.

中文翻译：

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基于超表面多维场的极化和拓扑电荷检测

将多种功能集成到一个设备中对于不断增长的光子设备需求非常重要。光学涡旋光束包含分别与相位奇点和偏振奇点相关的轨道角动量（OAM）和自旋角动量（SAM），这有助于各种应用，包括光学操纵、光捕获和高速光通信。传统的相位和偏振检测方法主要集中在单维光场的功能上。然而，与之前的报告完全不同，我们在这里提出了一种基于在单个元设备中充分利用近场和远场光功能来测量相位和偏振状态的新方法，它支持自旋控制的表面等离子体激元 (SPP) 和拓扑电荷相关的焦点位置。一方面，这种设计充分利用了多维场光散射特性，丰富了元器件的功能。另一方面，它提供了一种新的概念来识别涡旋光束的各种角动量信息。我们相信这种设计对于不同亚波长光学元件的集成将具有巨大的潜力。