Gate-tunable van der Waals heterostructure for reconfigurable neural network vision sensor

• DOI: 10.1126/sciadv.aba6173
• Publication Date: 2020-06-24T23:15:23Z
• Authors: Chen-Yu Wang; Shi-Jun Liang; Shuang Wang; Pengfei Wang; Zhu’an Li; Zhongrui Wang; Anyuan Gao; Chen Pan; Chuan Liu; Jian Liu; Huafeng Yang; Xiaowei Liu; Wenhao Song; Cong Wang; Bin Cheng; Xiaomu Wang; Kunji Chen; Zhenlin Wang; Kenji Watanabe; Takashi Taniguchi; J. Joshua Yang; Feng Miao
• Keywords: Machine Vision

Early processing of visual information takes place in the human retina. Mimicking neurobiological structures and functionalities retina provides a promising pathway to achieving vision sensor with highly efficient image processing. Here, we demonstrate prototype that operates via gate-tunable positive negative photoresponses van der Waals (vdW) vertical heterostructures. The emulates not only bipolar cells photoreceptors but also unique connectivity between photoreceptors. By tuning gate voltage for each pixel, achieve reconfigurable simultaneous sensing Furthermore, our itself can be trained classify input images by updating voltages applied individually pixel sensor. Our work indicates vdW heterostructures offer platform development neural network