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Polarization-sensitive neuromorphic vision sensing enabled by pristine black arsenic-phosphorus.

Shi Zhang^1,2,3, Shuguang Zhu¹, Shijian Tian¹

¹College of Physics and Optoelectronic Engineering, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, No. 1, Sub-Lane Xiangshan, Xihu District, Hangzhou, 310024, China.

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Summary

We developed a novel phototransistor using black arsenic-phosphorus that mimics human neural responses. This device enables advanced polarization imaging and neuromorphic computing for enhanced vision systems.

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Area of Science:

Materials Science
Neuroscience
Optoelectronics

Background:

Polarization-sensitive vision systems offer advantages in glare reduction and clarity.
Neuromorphic computing aims to mimic human neural functions for advanced processing.
Existing systems face challenges in complex lighting and data interpretation.

Purpose of the Study:

To develop a polarization-sensitive neuromorphic phototransistor for advanced vision applications.
To investigate the synaptic behaviors and plasticity of the phototransistor.
To demonstrate its capabilities in image classification, reconstruction, and polarization-resolved imaging.

Main Methods:

Fabrication of a phototransistor using black arsenic-phosphorus (BaP) 2D nanosheets.
Characterization of optoelectronic properties, including responsivity and polarization ratio.
Simulation of synaptic behaviors and plasticity through gate voltage and polarization control.
Development of a hybrid optical-electronic neural network for image tasks.
Implementation of polarization-resolved imaging for target reconstruction.

Main Results:

The BaP phototransistor exhibited high responsivity (2.88 A/W), polarization ratio (4.7), and dynamic range (40 dB).
Device successfully simulated synaptic behaviors with paired-pulse facilitation up to 201% and demonstrated gate-tunable plasticity.
Achieved >90% classification accuracy on Fashion-MNIST and 71.38% reconstruction accuracy on Yale Face Database.
Demonstrated high-fidelity reconstruction of hidden targets using polarization-resolved imaging.

Conclusions:

The BaP phototransistor serves as a foundational platform for high-performance neuromorphic vision systems.
Integrated polarization imaging, computation, and communication functionalities are enabled.
Addresses critical challenges in scalable brain-inspired optoelectronic technologies.