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Scalable nanofocusing heterojunctions for raptor-inspired on-chip vision perception
Lanhao Qin1, Jiazheng Wang2, Gaohang Huo1
1State Key Laboratory of New Textile Materials and Advanced Processing, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
Science Advances
|July 23, 2026
Summary
Researchers developed a plasmonic nanofocusing synaptic array (PNSA) inspired by raptor vision. This bioinspired sensor mimics retinal oil droplets for advanced visual sensing and motion perception, achieving high accuracy.
Area of Science:
- Materials Science
- Bioinspired Engineering
- Optoelectronics
Background:
- Biological visual systems offer insights into intelligent perception in dynamic environments.
- Raptor retinal oil droplets concentrate light, enhancing visual acuity.
Purpose of the Study:
- To develop a plasmonic nanofocusing synaptic array (PNSA) for bioinspired visual sensing and motion perception.
- To mimic the light-concentrating function of raptor retinal oil droplets using advanced materials.
Main Methods:
- Fabrication of a wafer-scale Au@MoS2 core-shell heterojunction.
- Utilizing localized surface plasmon resonance and hot-carrier generation for optoelectronic properties.
- Development of a 32x32 optoelectronic synaptic array with high yield and low variation.
Main Results:
- The PNSA demonstrated an ultrafast relaxation time of 2.2 ms, enabling a theoretical refresh rate of ~450 Hz.
- The synaptic array achieved 98.95% accuracy in motion-direction classification.
- The array supports 5-bit optical programming and generates temporally encoded motion representations.
Conclusions:
- The study presents a scalable materials platform for bioinspired visual sensing.
- The PNSA offers a promising approach for on-chip vision perception systems.
- This bioinspired design enhances light concentration for improved sensing capabilities.
