Single-pixel p-graded-n junction spectrometers

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 novel single-pixel-photodetector spectrometer with a spectral range from 480 nm to 820 nm, based on the AlGaAs/G...

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Bibliographic Details
Published in:arXiv.org 2023-06
Main Authors: Wang, Jingyi, Pan, Beibei, Wang, Zi, Zhang, Jiakai, Zhou, Zhiqi, Lu, Yao, Wu, Yanan, Ren, Wuwei, Wang, Jianyu, Yu, Jingyi, Chen, Baile
Format: Article
Language:English
Subjects:
Biocompatibility
Commercialization
Environmental monitoring
Pixels
Spectral resolution
Spectrometers
Online Access:Get full text
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Summary: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 novel 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.
ISSN:2331-8422