A Flexible Artificial Spiking Photoreceptor Enabled by a Single VO<sub>2</sub> Mott Memristor for the Spike-Based Electronic Retina
Chuanyu Han, Shujing Zhao, Sheng Li Fang, Weihua Liu, Wing Man Tang, P. T. Lai, Can Li, Yuan Xiao, Jia Qi Song, Xin Li, Xiao Li Wang, Wen Jun Ren, Rui Lin Wang, Xiaodong Huang, Guo He Zhang, Geng Li
Abstract
The neuromorphic vision system that utilizes spikes as information carriers is crucial for the formation of spiking neural networks. Here, we present a bioinspired flexible artificial spiking photoreceptor (ASP), which is realized by using a single VO 2 Mott memristor that can simultaneously sense and encode the stimulus light into spikes. The ASP has high spike-encoded photosensitivity and ultrawide photosensing range (405–808 nm) with good endurance (>7 × 10 7 ) and high flexibility (bending radius ∼5 mm). Then, we put forward an all-spike electronic retina architecture that comprises one layer of ASPs and one layer of artificial optical nerves (AONs) to process the spike information. Each AON consists of a single Mott memristor connected in series with a neuro-transistor that is a multiple-input floating-gate MOS transistor. Simulation results demonstrate that the all-spike electronic retina can successfully segment images with high Shannon entropy, thus laying the foundation for the development of a spike-based neuromorphic vision system.