Ultra-wide spectrum photosynapse array with 64k-scale for neuromorphic fusion imaging

Area of Science:

• Materials Science
• Neuroscience
• Electrical Engineering

Background:

• Bio-inspired photosynapse hardware offers potential for complex environment perception through wide spectrum imaging and neuromorphic processing.
• Integrating ultra-wide spectrum responsivity and large-scale arrays in photosynapse devices presents significant challenges.

Purpose of the Study:

• To demonstrate a scalable ultraviolet-to-mid-infrared photosynapse array for enhanced perception.
• To overcome limitations in integrating wide spectrum responsivity and large-scale fabrication.

Main Methods:

• Fabrication of a 64k-scale photosynapse array using carbon nanotube/molybdenum oxide heterojunctions.
• Utilized polydopamine-mediated surface treatment for homogeneous film deposition on transistor substrates.
• Confirmed photosynapse behavior across ultraviolet, visible, near-infrared, and mid-infrared spectrums.

Main Results:

• Achieved a 99.96% yield in fabricating the large-scale photosynapse array.
• Demonstrated enhanced image frame similarity from 0.897 to 0.965 in dynamic trajectory prediction.
• Attained 99.58% accuracy in trajectory recognition using wide spectrum neuromorphic fusion imaging, significantly outperforming visible light alone (63.93%).

Conclusions:

• The developed photosynapse array successfully integrates ultra-wide spectrum responsivity and large-scale fabrication.
• This technology significantly enhances perception capabilities under challenging conditions, paving the way for next-generation autonomous systems.