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- Title
Single-pixel p-graded-n junction spectrometers.
- Authors
Wang, Jingyi; Pan, Beibei; Wang, Zi; Zhang, Jiakai; Zhou, Zhiqi; Yao, Lu; Wu, Yanan; Ren, Wuwei; Wang, Jianyu; Ji, Haiming; Yu, Jingyi; Chen, Baile
- Abstract
Ultra-compact spectrometers are becoming increasingly popular for their promising applications in biomedical analysis, environmental monitoring, and food safety. In this work, we report a single-pixel-photodetector spectrometer with a spectral range from 480 nm to 820 nm, based on the AlGaAs/GaAs p-graded-n junction with a voltage-tunable optical response. To reconstruct the optical spectrum, we propose a tailored method called Neural Spectral Fields (NSF) that leverages the unique wavelength and bias-dependent responsivity matrix. Our spectrometer achieves a high spectral wavelength accuracy of up to 0.30 nm and a spectral resolution of up to 10 nm. Additionally, we demonstrate the high spectral imaging performance of the device. The compatibility of our demonstration with the standard III-V process greatly accelerates the commercialization of miniaturized spectrometers. The miniaturization of spectrometers to a submillimeter-scale footprint opens opportunities for applications in hyperspectral imaging and lab-on-a-chip systems. Here, the authors report a high-performance single-pixel photodetector spectrometer based on the III-V semiconductor p-graded-n junction, featuring a voltage-tunable optical response.
- Subjects
PHOTODETECTORS; HYPERSPECTRAL imaging systems; SPECTROMETERS; OPTICAL spectra; SEMICONDUCTOR junctions; ENVIRONMENTAL monitoring
- Publication
Nature Communications, 2024, Vol 15, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-024-46066-5