High transmission focusing lenses based on ultrathin all-dielectric Huygens’ metasurfaces
High transmission focusing lenses based on ultrathin all-dielectric Huygens’ metasurfaces
复制标题
基于超薄全电介质惠更斯超表面的高透射率聚焦镜头
DOI：
10.1016/j.optmat.2020.110358
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发表时间：
2020
影响因子：
3.9
通讯作者：
Wu Fei
中科院分区：
文献类型：
--
作者：
Tian Yanqing;Li Zhiwei;Xu Zhenyu;Wei Yunbing;Wu Fei
由于其可设计性，超表面被广泛应用于实现各种微型化光学元件，特别是透镜。然而，目前设计的大多数镜头都倾向于高长宽比，这极大地阻碍了它们的实际应用。在各种类型的超表面中，惠更斯的超表面提供了一个新的视角，它利用光谱重叠的电偶极子（ED）和磁偶极子（MD）米型共振来实现有效的波前控制。在这里，我们提出并设计了惠更斯超表面，它可以有效地操纵线偏振光在近红外波长进行光束聚焦（圆柱透镜的透射效率为73%，非球面透镜的透射效率为68%）。此外，所提出的超表面最显著的优点是它具有低纵横比，这使它成为未来集成在光学芯片上的理想平台。
Due to its designability, metasurfaces have been widely used to implement various miniaturized optical components, especially the lenses. However, most of the lenses currently designed tend to have high aspect ratios, which greatly hinders their practical applications. Among the various types of metasurfaces, Huygens' metasurfaces offer a new perspective, which utilize the spectrally overlapping electric dipole (ED) and magnetic dipole (MD) Mie-type resonances to achieve efficient wave-front control. Here, we proposed and designed Huygens’ metasurfaces that can efficiently manipulate linearly polarized light to perform beam focusing (73% transmission efficiency for cylindrical lens and 68% transmission efficiency for aspheric lens) at near-infrared wavelengths. Additionally, the most significant advantage of the proposed metasurface is that it has a low aspect ratio, which makes it an ideal platform for future integration on optical chip.