Contrallable Synaptic Behavior in Photonic Neuromorphic Transistor

In this work, we demonstrate a nanowire phototransistor with synaptic behavior. The device is based on a single crystalline InAs nanowire. The device mimics synaptic neuromorphic functions such as short-term plasticity and long-term plasticity. Moreover, these synaptic behaviors can be controlled by the application of gate voltage, that is, long-term plasticity is restrained/enhanced under the negative/positive gate bias. This synapse-like behavior of the transistor is attributed to the photogating effect.