Electrically tunable two-dimensional heterojunctions for miniaturized near-infrared spectrometers

Wenjie Deng, Zilong Zheng, Jingzhen Li, Rongkun Zhou, Xiaoqing Chen, Dehui Zhang, Yue Lu, Chongwu Wang, Congya You, Songyu Li, Ling Sun, Yi Wu, Xuhong Li, Boxing An, Zheng Liu, Qi jie Wang, Xiangfeng Duan () and Yongzhe Zhang ()
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Wenjie Deng: Beijing University of Technology
Zilong Zheng: Beijing University of Technology
Jingzhen Li: Beijing University of Technology
Rongkun Zhou: Beijing University of Technology
Xiaoqing Chen: Beijing University of Technology
Dehui Zhang: University of California, Los Angeles
Yue Lu: Beijing University of Technology
Chongwu Wang: Nanyang Technological University
Congya You: Beijing University of Technology
Songyu Li: Beijing University of Technology
Ling Sun: Beijing University of Technology
Yi Wu: Beijing University of Technology
Xuhong Li: Beijing University of Technology
Boxing An: Beijing University of Technology
Zheng Liu: Nanyang Technological University
Qi jie Wang: Nanyang Technological University
Xiangfeng Duan: University of California, Los Angeles
Yongzhe Zhang: Beijing University of Technology

Nature Communications, 2022, vol. 13, issue 1, 1-10

Abstract: Abstract Miniaturized spectrometers are of considerable interest for their portability. Most designs to date employ a photodetector array with distinct spectral responses or require elaborated integration of micro & nano optic modules, typically with a centimeter-scale footprint. Here, we report a design of a micron-sized near-infrared ultra-miniaturized spectrometer based on two-dimensional van der Waals heterostructure (2D-vdWH). By introducing heavy metal atoms with delocalized electronic orbitals between 2D-vdWHs, we greatly enhance the interlayer coupling and realize electrically tunable infrared photoresponse (1.15 to 1.47 μm). Combining the gate-tunable photoresponse and regression algorithm, we achieve spectral reconstruction and spectral imaging in a device with an active footprint

Date: 2022
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DOI: 10.1038/s41467-022-32306-z

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