metasurface-assisted graphene multidimensional photodetector
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Metasurface-enabled broadband multidimensional photodetectors
Hao Jiang, Yinzhu Chen, Wenyu Guo, Yan Zhang, Rigui Zhou, Mile Gu, Fan Zhong, Zhenhua Ni, Junpeng Lu, Cheng-Wei Qiu, Weibo Gao
Research context
Light encodes multidimensional information, such as intensity, polarization, and spectrum. Traditional extraction of this light information requires discrete optical components by subdividing the detection area into many “one-to-one” functional pixels. The broadband photodetection of high-dimensional optical information with a single integrated on-chip detector is highly sought after, yet it poses significant challenges. In this study, we employ a metasurface-assisted graphene photodetector, enabling to simultaneously detect and differentiate various polarization states and wavelengths of broadband light (1-8 μm) at the wavelength prediction accuracy of 0.5 μm. The bipolar polarizability empowered by this design allows to decouple multidimensional information (encompassing polarization and wavelength), which can be achieved by encoding vectorial photocurrents with varying polarities and amplitudes. Furthermore, cooperative multiport metasurfaces are adopted and boosted by machine learning techniques. It enables precise spin-wavelength differentiation over an extremely broad wavelength range (1-8 μm). Our innovation offers a recipe for highly compact and high-dimensional spectral-po
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machine-learning-assisted multiport metasurface decoding
Source PDF · page 1simultaneous broadband polarization and wavelength differentiation
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Hao Jiang, Yinzhu Chen, Wenyu Guo, Yan Zhang, Rigui Zhou, Mile Gu, Fan Zhong, Zhenhua Ni, Junpeng Lu, Cheng-Wei Qiu, Weibo Gao. Metasurface-enabled broadband multidimensional photodetectors. Nature Communications (2024). https://doi.org/10.1038/s41467-024-52632-8
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