光学
电介质
极化(电化学)
材料科学
菲涅耳方程
菲涅耳区天线
波带板
光电子学
物理
折射率
化学
辐射模式
计算机科学
电信
物理化学
衍射
天线(收音机)
缝隙天线
作者
Tian Zhang,Wei Wang,Jun Wang,Zhongyan Chen,Jie Lin,Peng Jin,Shutian Liu,Keya Zhou
标识
DOI:10.1088/1361-6463/ad800f
摘要
Abstract Conventional Fresnel zone plates (FZPs) can only achieve a single focusing function and require the combination with other optical elements to achieve multiple optical functions. This contradicts the development trends for miniaturized, integrated and multifunctional optical devices. However, the emergence of metasurfaces offers new solutions for this problem. In this paper, we design two different types of multifunctional metasurface Fresnel zone plates (MFZPs). One is based on amplitude modulation, and the other is based on phase modulation, both of which can achieve linear polarization conversion and focusing functions. The realization of these functions is based on the ability of silicon diatomic nanopillars to decouple and control the amplitude, phase, and polarization of electromagnetic waves. The designed ultrathin dielectric metasurface effectively combines the functions of conventional half-wave plates and FZPs, thereby reducing the volume of the optical system. The designed MFZPs have enormous potential for application in integrated and compact optical systems.
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