Haoyang He, Yuzhe Zhang, Yujie Shao, Yan Zhang, Guangzhou Geng, Junjie Li, Xin Li, Yongtian Wang, Liheng Bian, Jun Zhang, Lingling Huang
Near-infrared (NIR) spectral information is important for detecting and analyzing material compositions. However, snapshot NIR spectral imaging systems still pose significant challenges owing to the lack of high-performance NIR filters and bulky setups, preventing effective encoding and integration with mobile devices. In this study, we introduce a snapshot spectral imaging system that employs a compact NIR metasurface featuring 25 distinct C4 symmetry structures. Benefitting from the sufficient spectral variety and low correlation coefficient among these structures, center-wavelength accuracy of 0...
April 8, 2024: Advanced Materials