A Sunlight-Interference-Immune Artificial Optoelectronic Synaptic Device for Visual Perception and Memory.

Area of Science:

• Materials Science
• Neuroscience
• Optoelectronics

Background:

• Artificial photoelectric synaptic devices mimic the human visual system but suffer from sunlight interference.
• This interference limits their practical application in optical modulation and data processing.

Purpose of the Study:

• To design and fabricate a sunlight-interference-free artificial synaptic memristor.
• To demonstrate its application in photoelectric modulation using solar-blind ultraviolet light.
• To simulate biological synaptic functions and human visual perception.

Main Methods:

• Fabrication of a Ni/AlYN/ITO structure for the artificial synaptic memristor.
• Utilizing solar-blind ultraviolet light as the optical stimuli signal.
• Testing various biological synaptic functions and memory retention capabilities.

Main Results:

• The Ni/AlYN/ITO memristor demonstrated sunlight-interference-free operation.
• Successful simulation of short-term and long-term synaptic plasticity.
• Emulation of human visual perception and memory functions with significant retention (over 300 s).
• Output current remained unaffected by optical signal interference.

Conclusions:

• The developed device overcomes sunlight interference for artificial synaptic applications.
• It enables solar-blind ultraviolet perception and facilitates secure optical communication.
• This advancement supports brain-inspired computing and interference-resistant information processing.