论文标题
最近在扭曲的光中扭曲：介电元面的光学涡旋的视角
Recent twists in twisted light: A perspective on optical vortices from dielectric metasurfaces
论文作者
论文摘要
光学涡旋是流体动力学研究的流体涡流的电磁类似物。在这两种情况下，由轻度或流体制成的行驶波前都像开瓶器一样扭曲其传播轴 - 一个类比，它也启发了光涡流概念的第一个主张。尽管涡旋是自然界中最基本的拓扑激发之一，但在天然系统中，它们很少以其电磁形式发现，除非天文学中的能量来源，例如脉冲星，类星体和黑洞。主要是通过各种方法在实验室中人为地创建的光学涡旋。在这里，我们提供了关于在过去十年中震撼光学元件的技术的观点 - 元时间，平面纳米结构的变质材料 - 特别关注其用于成型和控制光学涡流的使用。
Optical vortices are the electromagnetic analogue of fluid vortices studied in hydrodynamics. In both cases the traveling wavefront, either made of light or fluid, is twisted like a corkscrew around its propagation axis - an analogy that inspired also the first proposition of the concept of optical vortex. Even though vortices are one of the most fundamental topological excitations in nature, they are rarely found in their electromagnetic form in natural systems, for the exception of energetic sources in astronomy, such as pulsars, quasars and black holes. Mostly optical vortices are artificially created in the laboratory by a rich variety of approaches. Here we provide our perspective on a technology that shook-up optics in the last decade - metasurfaces, planar nanostructured metamaterials - with a specific focus on its use for molding and controlling optical vortices.
