A neuromorphic bionic eye with filter-free color vision using hemispherical perovskite nanowire array retina

Zhenghao Long, Xiao Qiu, Chak Lam Jonathan Chan, Zhibo Sun, Zhengnan Yuan, Swapnadeep Poddar, Yuting Zhang, Yucheng Ding, Leilei Gu, Yu Zhou, Wenying Tang, Abhishek Kumar Srivastava, Cunjiang Yu, Xuming Zou, Guozhen Shen and Zhiyong Fan ()
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Zhenghao Long: The Hong Kong University of Science and Technology
Xiao Qiu: The Hong Kong University of Science and Technology
Chak Lam Jonathan Chan: The Hong Kong University of Science and Technology
Zhibo Sun: The Hong Kong University of Science and Technology
Zhengnan Yuan: The Hong Kong University of Science and Technology
Swapnadeep Poddar: The Hong Kong University of Science and Technology
Yuting Zhang: The Hong Kong University of Science and Technology
Yucheng Ding: The Hong Kong University of Science and Technology
Leilei Gu: Shanghai Jiao Tong University
Yu Zhou: The Hong Kong University of Science and Technology
Wenying Tang: The Hong Kong University of Science and Technology
Abhishek Kumar Srivastava: The Hong Kong University of Science and Technology
Cunjiang Yu: Pennsylvania State University
Xuming Zou: Hunan University
Guozhen Shen: Beijing Institute of Technology
Zhiyong Fan: The Hong Kong University of Science and Technology

Nature Communications, 2023, vol. 14, issue 1, 1-9

Abstract: Abstract Spherical geometry, adaptive optics, and highly dense network of neurons bridging the eye with the visual cortex, are the primary features of human eyes which enable wide field-of-view (FoV), low aberration, excellent adaptivity, and preprocessing of perceived visual information. Therefore, fabricating spherical artificial eyes has garnered enormous scientific interest. However, fusing color vision, in-device preprocessing and optical adaptivity into spherical artificial eyes has always been a tremendous challenge. Herein, we demonstrate a bionic eye comprising tunable liquid crystal optics, and a hemispherical neuromorphic retina with filter-free color vision, enabled by wavelength dependent bidirectional synaptic photo-response in a metal-oxide nanotube/perovskite nanowire hybrid structure. Moreover, by tuning the color selectivity with bias, the device can reconstruct full color images. This work demonstrates a unique approach to address the color vision and optical adaptivity issues associated with artificial eyes that can bring them to a new level approaching their biological counterparts.

Date: 2023
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DOI: 10.1038/s41467-023-37581-y

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