Hemispherical Retina Emulated by Plasmonic Optoelectronic Memristors with All-Optical Modulation for Neuromorphic...

Area of Science:

• Materials Science
• Neuroscience
• Electrical Engineering

Background:

• Binocular stereo vision requires analyzing retinal disparity for 3D environmental perception.
• Retinomorphic electronics mimic biological eyes, crucial for developing advanced stereo vision systems.

Purpose of the Study:

• To develop a hemispherical optoelectronic memristor array for binocular stereo vision.
• To achieve in-pixel image sensing and storage using all-optical modulation.

Main Methods:

• Fabrication of a hemispherical optoelectronic memristor array using Ag-TiO2 nanoclusters/sodium alginate film.
• Exploitation of plasmonic thermal effect and optical excitation for all-optical modulation.
• Experimental demonstration of wide field of view, spatial angle detection, depth perception, and motion detection.

Main Results:

• The developed device enables all-optical modulation for in-pixel image sensing and storage.
• Hemispherical geometry and incident-angle-dependent characteristics facilitate wide field of view and spatial angle detection.
• Successful realization of depth and motion detection through binocular disparity using two retinomorphic memristive arrays.

Conclusions:

• The study presents a promising strategy for all-optically controlled memristors.
• This work promotes the development of binocular vision systems with integrated in-sensor architectures.