Ultrasensitive graphene‐Si position‐sensitive detector for motion tracking

InfoMat

Wei Chen¹  Ruxia Du²  Litao Sun³  Wenhui Wang⁴  Junpeng Lu⁴  Zhenhua Ni⁴  Jie Jiang⁴  Kaiyang Liu⁴ 

[1] Centre for Functional Materials National University of Singapore (Suzhou) Research Institute Suzhou Industrial Park Jiangsu China;Department of Basic Teaching Nanjing Tech University Pujiang Institute Nanjing China;SEU‐FEI Nano‐Pico Center, Key Laboratory of MEMS of Ministry of Education, Collaborative Innovation Center for Micro/Nano Fabrication, Device and System Southeast University Nanjing China;School of Physics and Key Laboratory of MEMS of the Ministry of Education Southeast University Nanjing China;

关键词: graphene;    heterojunction;    motion tracking;    oxygen plasma;    position‐sensitive detectors;   

DOI  :  10.1002/inf2.12081

来源: DOAJ

【 摘 要 】

Abstract 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 ~ 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 ~ 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 optoelectronic devices.

【 授权许可】

Unknown