7 Papers
4 Citations
Zhu Li is an academic researcher from Chinese Academy of Sciences. The author has contributed to research in topics: Achromatic lens & Ray. The author has an hindex of 3, co-authored 5 publications. Previous affiliations of Zhu Li include The Institute of Optics.
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Papers
Achromatic Broadband Super-Resolution Imaging by Super-Oscillatory Metasurface
Zhu Li,Tao Zhang,Tao Zhang,Yanqin Wang,Weijie Kong,Jian Zhang,Yijia Huang,Changtao Wang,Xiong Li,Mingbo Pu,Xiangang Luo +10 more
Abstract: Past decades have seen enormous efforts to achieve subdiffraction resolution optical imaging, but most of them are suffering from either complex near‐field manipulation or prelabeling of specific specimen, like scanning near‐field optical microscopes and stimulated emission depletion microscopes. The optical super‐oscillation phenomenon seems to provide a method of far field super‐resolution imaging without particularly dealing with objects. However, the reported optical super‐oscillation imaging methods were usually constrained to narrow bandwidth, which is mainly due to the inherent complex light interference features. Here, benefiting from the nearly dispersionless feature of phase modulations with metasurface, a super‐oscillatory metasurface filter is proposed for broadband super‐resolution imaging. In demonstrative experiments, resolving ability of about 0.64 times of the Rayleigh criterion is obtained for visible light ranging from 400 to 700 nm. This method is expected to potentially promote the development of super‐resolving telescopes and microscopes based on super‐oscillation optics.
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Super-oscillatory metasurface doublet for sub-diffraction focusing with a large incident angle.
Zhu Li,Changtao Wang,Yanqin Wang,Xinjian Lu,Yinghui Guo,Xiong Li,Xiaoliang Ma,Mingbo Pu,Xiangang Luo +8 more
TL;DR: In this article, a super-oscillatory metasurface doublet is proposed to achieve far-field sub-diffraction focusing with an incident angle of up to 25°.
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Switchable polarization-multiplexed super-oscillatory metasurfaces for achromatic sub-diffraction focusing.
Xinjian Lu,Yinghui Guo,Mingbo Pu,Mingfeng Xu,Jinjin Jin,Zhu Li,Xiong Li,Xiaoliang Ma,Xiangang Luo +8 more
TL;DR: An achromatic polarization-multiplexed super-oscillatory metasurface has been proposed to realize flexible light field modulations at different colors and could simplify the super-resolution optical imaging system and is expected to have widespread applications in color imaging, microscopy, and machine vision.
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Depth-assisted calibration on learning-based factorization for a compressive light field display.
Yangfan Sun,Zhu Li,Shizheng Wang,W. Gao +3 more
TL;DR: In this paper , a dual-guided learning-based factorization on polarization-based compressive light field (CLF) display with depth-assisted calibration is proposed. But the performance of the factorization is limited by processing complexity and reconstruction performance.
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Polarization-insensitive meta-lens doublet with large view field in the ultraviolet region
Dewei He,Dewei He,Fei Zhang,Fei Zhang,Yanqin Wang,Zhu Li,Zhu Li,Ma Xiaoliang,Zeyu Zhao,Xiong Li,Changtao Wang,Guo Yinghui,Mingbo Pu,Luo Xiangang +13 more
- 30 Jan 2019
TL;DR: In this paper, a composed dielectric meta-lens doublet by the electromagnetic simulation can achieve perfectly diffraction-limited monochromatic focus for the polarization-insensitive incident lights at a wavelength of 375 nm, which has the view field of 60°, the numerical aperture of 0.5, and focal length of 380μm.
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