One-shot ultraspectral imaging with reconfigurable metasurfaces

Subjects: Optics >> Quantum optics submitted time 2023-02-19

Jian Xiong Xusheng Cai Kaiyu Cui Yidong Huang Jiawei Yang Hongbo Zhu Zekun Zheng Sheng Xu Yuhan He Fang Liu Xue Feng Wei Zhang

Abstract： One-shot spectral imaging that can obtain spectral information from different points in space at one time has always been difficult to achieve, and is extremely important for both fundamental scientific research and various practical applications. In this study, one-shot ultraspectral imaging by fitting thousands of micro-spectrometers on a chip, is proposed and demonstrated. Exotic light modulation is achieved by using a reconfigurable metasurface supercell, which enables 155,216 image-adaptive micro-spectrometers, simultaneously guaranteeing the spectral-pixel density and reconstructed spectral quality. By constructing a compressive-sensing algorithm, the device can reconstruct ultraspectral imaging ($\Delta\lambda$/$\lambda$~0.001) covering a 300-nm-wide visible spectrum with an ultra-high center-wavelength accuracy of 0.04-nm standard deviation and spectral resolution of 0.8 nm. This scheme can be extended to almost any commercial camera with different spectral bands to seamlessly switch between image and spectral image, and opens up a new space for the application of spectral analysis combining with image recognition and intellisense.

Peer Review Status:Awaiting Review

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