Water-immersion supercritical metalens

Junzheng Zhou,Yi Zhou,Fengliang Dong,Kun Zhang,Lihua Xu,Zhiwei Song,Zhengguo Shang,Gaofeng Liang,Zhihai Zhang,Zhongquan Wen,Luru Dai,Weiguo Chu,Gang Chen

Optics & Laser Technology（2023）

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Abstract

•A water-immersion supercritical metalens with a large numerical aperture and suppressed sidebands.•The water-immersion supercritical metalens can form a spot size of 0.33λ at a distance of 60λ from the lens and sidelobe ratio of 0.13.•The water-immersion metalens could avoid contamination from the immersion medium.•Great potential in label-free far-field super-resolution microscopy.

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Key words

Water-immersion,Supercritical metalens,Super-resolution microscopy,Deepsubwavelength focusing

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