Achromatic Broadband Super‐Resolution Imaging by Super‐Oscillatory Metasurface

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. Th...

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Bibliographic Details
Published in:Laser & photonics reviews 2018-10, Vol.12 (10), p.n/a
Main Authors: Li, Zhu, Zhang, Tao, Wang, Yanqin, Kong, Weijie, Zhang, Jian, Huang, Yijia, Wang, Changtao, Li, Xiong, Pu, Mingbo, Luo, Xiangang
Format: Article
Language:English
Subjects:
Broadband
Far fields
metasurface
Metasurfaces
Microscopes
Optical microscopes
Stimulated emission
super‐oscillation
super‐resolution
Telescopes
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Summary: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. An achromatic super‐oscillation imaging method is proposed based on a metasurface filter (MF). The MF is designed and demonstrated to achieve broadband dispersionless phase modulation, which could finally attain a white‐light super‐resolution imaging. This method is believed to be widely applicable in super‐resolution microscopes and telescopes especially when a wide range of light wavelengths are considered
ISSN:1863-8880
1863-8899
DOI:10.1002/lpor.201800064