All-Optical Modulated Artificial Synapse Based on Quantum Dots/Oxide Heterojunction for Neuromorphic Visual Simulation

Artificial synapses capable of optical sensing and synaptic functions are essential for developing neuromorphic visual systems. We utilized quantum dots (QDs)/oxide heterostructure to achieve bidirectional synaptic weight modulation under ultraviolet and infrared light by the change of depletion layer width of the p-n junction. Such an all-optically controlled artificial synapse shows a promising prospect for future neuromorphic visual systems.