Huang Zhenyu, Qin Maosen, Guo Xiaowei, Yang Cheng, Li Shaorong
Opt Express. 2021 Apr 26;29(9):13542-13551. doi: 10.1364/OE.422126.
Optical metalens has been attracting more and more attention in recent years. To date, it is still difficult to simultaneously achieve wide field and broadband imaging in the visible region, which is very important in many applications, such as cameras, microscopy, and other imaging devices. In this paper, we design a double-layer metalens to achieve achromatic imaging over a field of view (FOV) of 60° in the visible light range of 470 nm to 650 nm, and its performance is verified by numerical simulations. The numerical aperture (NA) of the metalens is 0.61 and the average focusing efficiency is > 50% at normal incidence. The metalens has an additional advantage of polarization insensitivity.
近年来，光学超构透镜越来越受到关注。迄今为止，在可见光区域同时实现宽视场和宽带成像仍然很困难，而这在许多应用中非常重要，如相机、显微镜和其他成像设备。在本文中，我们设计了一种双层超构透镜，以在470 nm至650 nm的可见光范围内实现60°视场（FOV）的消色差成像，并通过数值模拟验证了其性能。该超构透镜的数值孔径（NA）为0.61，在正入射时平均聚焦效率大于50%。该超构透镜还具有偏振不敏感的额外优点。
