Fully Light Modulated Self-Powered Optoelectronic Memristor for Neuromorphic Computing

Conventional Von Neuman architectures are now experiencing significant challenges, and memristor-based neuromorphic devices have demonstrated the advantages of enabling in- memory computing. Here, we report a memristor that can be completely modulated by optical signals to modulate the device conductance, while also enabling a self-powered function. Furthermore, the device can simulate various distinguished behaviors of the human brain under pure light stimulation, such as excitatory post-synaptic current (EPSC), paired-pulse facilitation (PPF), transition from short-term memory (STM) to long-term memory (LTM), and human-like brain learning behaviors, while demonstrating good reliability. By selecting light stimuli with different wavelengths, long-term potentiation (LTP) and long-term depression (LTD) can be achieved, respectively. The device reported in this letter offers the potential for neuromorphic devices in many important applications.