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Object Motion Detection Enabled by Reconfigurable Neuromorphic Vision Sensor under Ferroelectric Modulation.

Zhaoying Dang^1,2,3, Feng Guo^1,2, Zhaoqing Wang^1,4

¹Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong 999077, China.

|September 26, 2024

Summary

This summary is machine-generated.

This study introduces a novel vision sensor inspired by biological cells for efficient object motion detection (OMD). The device achieves zero power consumption and high accuracy, enabling advanced neuromorphic computing applications.

Keywords:

2D materials ferroelectricity high-linear nonvolatile multistates neuromorphic vision sensor object motion detection

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Area of Science:

Materials Science
Neuroscience
Electrical Engineering

Background:

Object motion detection (OMD) demands reduced redundancy, improved power efficiency, and precise programming for accuracy.
Existing systems struggle to meet these demands, necessitating innovative solutions.

Purpose of the Study:

To propose a novel object motion detection (OMD) vision sensor inspired by biological ganglion cells.
To achieve zero power consumption, high accuracy, and synaptic weight emulation for neuromorphic applications.

Main Methods:

Developed a vision sensor using a WSe2 homojunction modulated by a ferroelectric copolymer.
Implemented progressive and bidirectional photocurrent generation with discrete multistates.
Emulated synaptic weight updating with 82 states and high linearity (R^2 of 0.999).

Main Results:

The vision sensor operates at zero power consumption, generating multistate photocurrents.
Demonstrated nonvolatility, reversibility, symmetry, and ultrahigh linearity (0.01/-0.01 nonlinearity).
Achieved 96.8% recognition accuracy in a neural network for motion detection.

Conclusions:

The proposed OMD vision sensor offers a controllable and energy-efficient platform for motion detection.
The device emulates synaptic plasticity, paving the way for advanced neuromorphic computing.
Scalable potential demonstrated via a 3x3 neuromorphic vision sensor array.