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Near-Sensor Neuromorphic Computing System Based on a Thermopile Infrared Detector and a Memristor for Encrypted Visual Information Transmission

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Download Hi-Res ImageDownload to MS-PowerPointCite This:Nano Lett. 2025, 25, 19, 8049-8057
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    Near-Sensor Neuromorphic Computing System Based on a Thermopile Infrared Detector and a Memristor for Encrypted Visual Information Transmission
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    • Zheng Wang
      Zheng Wang
      School of Integrated Circuits, Shandong University, Jinan 250100, China
      Suzhou Research Institute, Shandong University, Suzhou 215123, China
      More by Zheng Wang
    • Jinhao Zhang
      Jinhao Zhang
      School of Integrated Circuits, Shandong University, Jinan 250100, China
      Suzhou Research Institute, Shandong University, Suzhou 215123, China
      More by Jinhao Zhang
    • Zhenyu Zhang
      Zhenyu Zhang
      State Key Laboratory of Extreme Environment Optoelectronic Dynamic Measurement Technology and Instrument, North University of China, Shanxi, Taiyuan 030051, China
      More by Zhenyu Zhang
    • Jialin Meng*
      Jialin Meng
      School of Integrated Circuits, Shandong University, Jinan 250100, China
      Suzhou Research Institute, Shandong University, Suzhou 215123, China
      National International Innovation Center, Shanghai 201203, China
      Key Laboratory of Computational Neuroscience and Brain-Inspired Intelligence, Ministry of Education, Fudan University, Shanghai 200433, P. R. China
      *Email: [email protected]
      More by Jialin Meng
    • Cheng Lei*
      Cheng Lei
      State Key Laboratory of Extreme Environment Optoelectronic Dynamic Measurement Technology and Instrument, North University of China, Shanxi, Taiyuan 030051, China
      *Email: [email protected]
      More by Cheng Lei
    • Tianyu Wang*
      Tianyu Wang
      School of Integrated Circuits, Shandong University, Jinan 250100, China
      Suzhou Research Institute, Shandong University, Suzhou 215123, China
      National International Innovation Center, Shanghai 201203, China
      State Key Laboratory of Materials for Integrated Circuits, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, 865 Changning Road, Shanghai 200050, China
      *Email: [email protected]
      More by Tianyu Wang
      Orcidhttps://orcid.org/0000-0001-8114-3481
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    Nano Letters

    Cite this: Nano Lett. 2025, 25, 19, 8049–8057
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    https://doi.org/10.1021/acs.nanolett.5c01843
    Published May 6, 2025
    Copyright © 2025 American Chemical Society
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    Abstract

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    Near-sensor neuromorphic computing systems that utilize photodetectors and memristors exhibit significant promise in the domains of visual information processing, transmission, and noise reduction recognition. In comparison to conventional photodetectors operating within the visible-light spectrum, thermopile infrared detectors offer distinct advantages in terms of concealment and security. This study proposes an integrated near-sensor computing system that combines a thermoelectric infrared detector with a memristor, which demonstrates a broad detection range (100–310 °C), rapid response time for sensing infrared signals, and excellent neuromorphic computing characteristics for information processing. Besides high-accuracy recognition of handwritten digits, near-infrared visual information recognition and voice recognition for double information encryption were demonstrated in the system. This neuromorphic computing system holds considerable potential for applications in the propagation, encryption, and recognition of security information within the infrared spectrum.

    Copyright © 2025 American Chemical Society

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    Supporting Information

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    The Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acs.nanolett.5c01843.

    • Fabrication and characterization methods, device structure and material composition, detailed SEM images of the cold and hot junctions, process flowchart, ANSYS simulation of temperature and heat flux, schematic diagram of the thermopile test system, various waveforms of the detector tested by the infrared signal source at 100, 150, 227, and 310 °C, Pt/HflAlOx /TiN memristor resistance switching mechanism, IPSC behavior, cumulative probability of memristor set/reset voltage, pulse parameter dependent plasticity, thermopile infrared detector array optical image, MNIST recognition results under different noise ratios, and schematic diagram of cardboard materials capable of absorbing light of different wavelengths and CNN hardware speech recognition system (PDF)

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    Nano Letters

    Cite this: Nano Lett. 2025, 25, 19, 8049–8057
    Click to copy citationCitation copied!
    https://doi.org/10.1021/acs.nanolett.5c01843
    Published May 6, 2025
    Copyright © 2025 American Chemical Society
    Request reuse permissions

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