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Reconfigurable Snapshot Hyperspectral Imaging Sensor Based on Monochromatic Pattern Match of Gradient Geometry Metasurface
ACS Photonics ( IF 6.5 ) Pub Date : 2024-09-01 , DOI: 10.1021/acsphotonics.4c01136
Ji Yang 1 , Xiangyi Ye 1 , Chenyu Liao 1 , Baohua Wen 1 , Chang Liu 1 , Jingxuan Cai 1 , Jianhua Zhou 1
Affiliation  

Metasurface-based hyperspectral imaging has profoundly impacted the field, with its easy integration and miniaturization advantages. Notably, metallic metasurfaces have been a research subject in sensing and imaging due to their strong capability of restraining light and supporting high-fidelity and cost-effective manufacturing processes. In this work, a novel metallic metasurface with gradient geometry was proposed for hyperspectral imaging, which highlights the advantages of defect tolerance and reconfigurability of imaging units with a spectral image resolution of 135 × 75 superpixels. An orthogonal matching algorithm with postcalibration based on monochromatic transmittance images of the metasurface was designed for spectral reconstruction. The proposed reconstruction algorithm simplifies calibration and can compensate for systematic losses. The operating bandwidth of the hyperspectral imaging sensor can be reconfigured, and the miniaturized nature makes it potentially integrated into smartphones and other instruments with lightweight computing and fast reconstruction. Moreover, the strategy has been validated in sensing and real-object surface imaging with a spectral resolution of approximately 1.99 nm under a 2 nm line width. Its efficacy is verified in the 400–800 nm band with a high fidelity of up to 86.7%.

中文翻译:


基于梯度几何超表面单色模式匹配的可重构快照高光谱成像传感器



基于超表面的高光谱成像以其易于集成和小型化的优势对该领域产生了深远的影响。值得注意的是,金属超表面因其强大的抑制光能力和支持高保真且经济高效的制造工艺而成为传感和成像领域的研究课题。在这项工作中,提出了一种用于高光谱成像的新型具有梯度几何形状的金属超表面,突出了光谱图像分辨率为135×75超像素的成像单元的缺陷容限和可重构性的优势。设计了一种基于超表面单色透射率图像的后校准正交匹配算法,用于光谱重建。所提出的重建算法简化了校准并且可以补偿系统损失。高光谱成像传感器的工作带宽可以重新配置,其小型化特性使其有可能集成到智能手机和其他具有轻量级计算和快速重建的仪器中。此外,该策略已在传感和真实物体表面成像中得到验证,在 2 nm 线宽下光谱分辨率约为 1.99 nm。其功效在 400–800 nm 波段得到验证,保真度高达 86.7%。
更新日期:2024-09-01
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