Among various flat optical devices, metasurfaces have presented their great ability in efficient manipulation of light fields and have been proposed for variety of devices with specific functionalities. However, due to the high phase dispersion of their building blocks, metasurfaces significantly suffer from large chromatic aberration. Here we propose a design principle to realize achromatic metasurface devices which successfully eliminate the chromatic aberration over a continuous wavelength region from 1200 to 1680 nm for circularly-polarized incidences in a reflection scheme. For this proof-of-concept, we demonstrate broadband achromatic metalenses (with the efficiency on the order of ∼12%) which are capable of focusing light with arbitrary wavelength at the same focal plane. A broadband achromatic gradient metasurface is also implemented, which is able to deflect wide-band light by the same angle. Through this approach, various flat achromatic devices that were previously impossible can be realized, which will allow innovation in full-color detection and imaging.Metasurfaces suffer from large chromatic aberration due to the high phase dispersion of their building blocks, limiting their applications. Here, Wang et al. design achromatic metasurface devices which eliminate the chromatic aberration over a continuous region from 1200 to 1680 nm in a reflection schleme.

中文翻译：

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宽带消色差光学超表面装置。

在各种平面光学装置中，超颖表面已经展现出其在光场的有效操纵中的强大能力，并已被提出用于具有特定功能的各种装置。但是，由于其构造块的高相位色散，超颖表面会明显遭受较大的色差。在这里，我们提出一种设计原理，以实现消色差超表面器件，该器件可以成功消除反射方案中圆偏振入射在1200至1680 nm连续波长范围内的色差。对于这一概念验证，我们演示了宽带消色差金属感官（效率约为12％），它们能够将任意波长的光聚焦在同一焦平面上。还实现了宽带消色差梯度超表面，能够以相同角度偏转宽带光。通过这种方法，可以实现以前无法实现的各种平面消色差设备，这将实现全色检测和成像方面的创新。由于其构造块的高相位色散，使得超颖表面遭受大的色差，从而限制了它们的应用。在这里，王等。我们设计了消色差超表面器件，可消除反射模式中1200至1680 nm连续区域内的色差。超颖表面由于其构造块的高相位色散而遭受较大的色差，从而限制了它们的应用。在这里，王等。我们设计了消色差超表面器件，可消除反射模式中1200至1680 nm连续区域内的色差。超颖表面由于其构造块的高相位色散而遭受较大的色差，从而限制了它们的应用。在这里，王等。我们设计了消色差超表面器件，可消除反射模式中1200至1680 nm连续区域内的色差。