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Gate-tunable van der Waals heterostructure for reconfigurable neural network vision sensor.
Science Advances ( IF 13.6 ) Pub Date : 2020-06-24 , DOI: 10.1126/sciadv.aba6173
Chen-Yu Wang 1 , Shi-Jun Liang 1 , Shuang Wang 1 , Pengfei Wang 1 , Zhu'an Li 1 , Zhongrui Wang 2 , Anyuan Gao 1 , Chen Pan 1 , Chuan Liu 3 , Jian Liu 3 , Huafeng Yang 3 , Xiaowei Liu 1 , Wenhao Song 2 , Cong Wang 1 , Bin Cheng 1 , Xiaomu Wang 3 , Kunji Chen 3 , Zhenlin Wang 1 , Kenji Watanabe 4 , Takashi Taniguchi 4 , J Joshua Yang 2 , Feng Miao 1
Affiliation  

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



中文翻译:

门可调节的范德华异质结构,用于可重构神经网络视觉传感器。

视觉信息的早期处理发生在人类视网膜中。模仿视网膜的神经生物学结构和功能,为实现具有高效图像处理的视觉传感器提供了有希望的途径。在这里,我们演示了一种原型视觉传感器,该传感器通过范德华(vdW)垂直异质结构的门可调正负光响应进行操作。该传感器不仅模拟双极细胞和感光器的神经生物学功能,而且还模拟双极细胞和感光器之间的独特连接性。通过调整每个像素的栅极电压,我们实现了可重配置的视觉传感器,用于同时进行图像感测和处理。此外,我们的原型视觉传感器本身可以通过更新分别施加到传感器中每个像素的栅极电压来训练,以对输入图像进行分类。我们的工作表明,vdW垂直异质结构为神经网络视觉传感器的发展提供了一个有希望的平台。

更新日期:2020-06-25
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