Optical Metasurfaces for Designing Planar Cassegrain-Schwarzschild Objectives
Optical Metasurfaces for Designing Planar Cassegrain-Schwarzschild Objectives
复制标题
用于设计平面卡塞格伦-史瓦西物镜的光学超表面
DOI：
10.1103/physrevapplied.11.054055
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发表时间：
2019-05-21
影响因子：
4.6
通讯作者：
Li, Guixin
中科院分区：
文献类型：
--
作者：
Liu, Xuan;Deng, Junhong;Li, Guixin
反射物镜广泛应用于许多成像系统中，但由于其弯曲的反射镜，很难实现紧凑。为了解决这一问题，作者通过用基于几何相位的平面超表面代替传统的曲面镜，使卡塞格伦式物镜平面化。这些反射超表面物镜本质上没有残留光，因此与折射超透镜相比，在照明精度和纳米制造方面的要求较低。这种平面超表面设计可以重塑和简化许多显微镜和望远镜的核心部件，并为超紧凑光学开辟了一条道路。
Reflective objectives are widely used in many imaging systems, but can hardly be compact, due to their curved mirrors. To address this problem, the authors planarize the mirrors in a Cassegrain-style objective by substituting geometric-phase-based flat metasurfaces for conventional curved mirrors. These reflective metasurface objectives are intrinsically free of residual light, and thus less demanding in terms of precision in illumination and nanofabrication, compared to refractive metalenses. This planar metasurface design can potentially reshape and simplify the core components of many microscopes and telescopes, and opens an avenue to ultracompact optics.