A Flexible Artificial\nSpiking Photoreceptor Enabled\nby a Single VO<sub>2</sub> Mott Memristor for the Spike-Based Electronic\nRetina

The neuromorphic vision system that utilizes spikes as\ninformation\ncarriers is crucial for the formation of spiking neural networks.\nHere, we present a bioinspired flexible artificial spiking photoreceptor\n(ASP), which is realized by using a single VO<sub>2</sub> Mott memristor\nthat can simultaneously sense and encode the stimulus light into spikes.\nThe ASP has high spike-encoded photosensitivity and ultrawide photosensing\nrange (405–808 nm) with good endurance (>7 × 10<sup>7</sup>) and high flexibility (bending radius ∼5 mm). Then,\nwe put\nforward an all-spike electronic retina architecture that comprises\none layer of ASPs and one layer of artificial optical nerves (AONs)\nto process the spike information. Each AON consists of a single Mott\nmemristor connected in series with a neuro-transistor that is a multiple-input\nfloating-gate MOS transistor. Simulation results demonstrate that\nthe all-spike electronic retina can successfully segment images with\nhigh Shannon entropy, thus laying the foundation for the development\nof a spike-based neuromorphic vision system.