Circular polarization-resolved ultraviolet photonic artificial synapse based on chiral perovskite

Qi Liu, Qi Wei, Hui Ren, Luwei Zhou, Yifan Zhou, Pengzhi Wang, Chenghao Wang, Jun Yin and Mingjie Li ()
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Qi Liu: The Hong Kong Polytechnic University
Qi Wei: The Hong Kong Polytechnic University
Hui Ren: The Hong Kong Polytechnic University
Luwei Zhou: The Hong Kong Polytechnic University
Yifan Zhou: The Hong Kong Polytechnic University
Pengzhi Wang: The Hong Kong Polytechnic University
Chenghao Wang: The Hong Kong Polytechnic University
Jun Yin: The Hong Kong Polytechnic University
Mingjie Li: The Hong Kong Polytechnic University

Nature Communications, 2023, vol. 14, issue 1, 1-10

Abstract: Abstract Circularly polarized light (CPL) adds a unique dimension to optical information processing and communication. Integrating CPL sensitivity with light learning and memory in a photonic artificial synapse (PAS) device holds significant value for advanced neuromorphic vision systems. However, the development of such systems has been impeded by the scarcity of suitable CPL active optoelectronic materials. In this work, we employ a helical chiral perovskite hybrid combined with single-wall carbon nanotubes to achieve circularly polarized ultraviolet neuromorphic vision sensing and imaging. The heterostructure demonstrates long-term charge storage as evidenced by multiple-pulsed transient absorption measurements and highly sensitive circular polarization-dependent photodetection, thereby enabling efficient CPL-resolved synaptic and neuromorphic behaviors. Significantly, our PAS sensor arrays adeptly visualize, discriminate, and memorize distinct circularly polarized images with up to 93% recognition accuracy in spiking neural network simulations. These findings underscore the pivotal role of chiral perovskites in advancing PAS technology and circular polarization-enhanced ultraviolet neuromorphic vision systems.

Date: 2023
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DOI: 10.1038/s41467-023-43034-3

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