Single-Element Diffraction-Limited Fisheye Metalens.,Nano Letters

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Single-Element Diffraction-Limited Fisheye Metalens.
Nano Letters ( IF 9.6 ) Pub Date : 2020-09-18 , DOI: 10.1021/acs.nanolett.0c02783
Mikhail Y Shalaginov ₁ , Sensong An ₂ , Fan Yang ₁ , Peter Su ₁ , Dominika Lyzwa ₃ , Anuradha M Agarwal _{1,

4} , Hualiang Zhang ₂ , Juejun Hu _{1,

4} , Tian Gu _{1,

4}

Affiliation

Wide field-of-view (FOV) optical functionality is crucial for implementation of advanced imaging and image projection devices. Conventionally, wide FOV operation is attained with complicated assembly of multiple optical elements known as “fisheye lenses”. Here we present a novel metalens design capable of performing diffraction-limited focusing and imaging over an unprecedented near 180° angular FOV. The lens is monolithically integrated on a one-piece flat substrate and involves only a single layer of metasurface that corrects third-order Seidel aberrations including coma, astigmatism, and field curvature. The metalens further features a planar focal surface, which enables considerably simplified system architectures for applications in imaging and projection. We fabricated the metalens using Huygens meta-atoms operating at 5.2 μm wavelength and experimentally demonstrated aberration-free focusing and imaging over the entire FOV. The design concept is generic and can be readily adapted to different meta-atom geometries and wavelength ranges to meet diverse application demands.

中文翻译：

单元素衍射限制的鱼眼金属化剂。

宽视场（FOV）光学功能对于实现高级成像和图像投影设备至关重要。常规地，通过被称为“鱼眼镜头”的多个光学元件的复杂组装来实现宽的FOV操作。在这里，我们提出了一种新颖的金属设计，该设计能够在前所未有的近180°角FOV上执行衍射极限聚焦和成像。该透镜单片集成在一块平坦的基板上，仅涉及一个单层的超颖表面，可校正三阶Seidel像差，包括彗差，像散和像场弯曲。这些金属元件还具有一个平面焦面，可大大简化用于成像和投影应用的系统架构。我们使用5℃下工作的惠更斯形原子制造了金属元素。2μm波长，并在实验上证明了整个FOV的无像差聚焦和成像。设计概念是通用的，可以很容易地适应不同的亚原子几何形状和波长范围，以满足各种应用需求。

更新日期：2020-10-15

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