Journal
INFOMAT
Volume 2, Issue 4, Pages 761-768Publisher
WILEY
DOI: 10.1002/inf2.12081
Keywords
graphene; heterojunction; motion tracking; oxygen plasma; position-sensitive detectors
Categories
Funding
- China Postdoctoral Science Foundation [2018M632197]
- Natural Science Research Projects in Colleges and Universities of Jiangsu Province [18KJD140003]
- National Natural Science Foundation of China [11704068, 61774034]
- Fundamental Research Funds for the Central Universities [2242019R20025]
- National Key Research and Development Program of China [2017YFA0205700]
- Strategic Priority Research Program of Chinese Academy of Sciences [XDB30000000]
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Motion tracking has attracted great attention in the fields of real-time tracking, nanorobotics, and targeted therapy. For achieving more accurate motion tracking, the highly sensitive position-sensitive detector (PSD) is desirable. Here, we demonstrate a meliorated PSD based on graphene-Si heterojunction for motion tracking. The position sensitivity of PSD was improved by employing surface engineering of graphene. Through modulating the transport property of graphene, nearly 20-fold increase of sensitivity was achieved under weak light, and at the same time, the detection limit power was reduced to similar to 2 nW. A motion tracking system was developed based on the improved PSD, and human arm swing was tracked, which demonstrated high sensitivity and real-time tracking capabilities of the PSD. In addition, the PSD can support up to similar to 10 kHz high-frequency tracking. This work provides a new strategy for improving the performance of PSD, and promotes the development of two-dimensional materials in novel opto-electronic devices.
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