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

Author:

Long Zhenghao,Qiu Xiao,Chan Chak Lam Jonathan,Sun Zhibo,Yuan Zhengnan,Poddar Swapnadeep,Zhang Yuting,Ding Yucheng,Gu Leilei,Zhou YuORCID,Tang Wenying,Srivastava Abhishek KumarORCID,Yu CunjiangORCID,Zou XumingORCID,Shen GuozhenORCID,Fan ZhiyongORCID

Abstract

AbstractSpherical 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.

Publisher

Springer Science and Business Media LLC

Subject

General Physics and Astronomy,General Biochemistry, Genetics and Molecular Biology,General Chemistry,Multidisciplinary

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