Multiwavelength Optical Pulse-Induced Temporal State Mapping in an ITO/SnO₂/ITO Optoelectronic Synaptic Device.

IF 4.8 3区材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Nanomaterials Pub Date : 2026-10-08 DOI:10.3390/nano16191268

Senyu Zhuang, Zhuang Hou, Shuqi Teng, Yingqi Zhao, Yongqi Song, Xuanyu Shan, Meng Qi, Mingan Luan, Ye Tao

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引用次数: 0

Abstract

A vertical ITO/SnO₂/ITO optoelectronic synaptic device was fabricated by magnetron sputtering for optical sensing and temporal-state encoding. The ITO/SnO₂ stack exhibited 88.3% average transmittance over 400-800 nm. The device responded to 380, 550 and 660 nm illumination and showed paired-pulse facilitation (PPF) together with pulse-width, interval and number-dependent modulation, evidencing finite-timescale history dependence and pulse-dependent accumulation. These dynamics are consistent with rapid photocarrier excitation followed by slower localized-state trapping, detrapping, redistribution and relaxation, detrapping, redistribution and relaxation. All 16 possible 4-bit optical sequences were experimentally applied and identical pulse numbers arranged at different temporal positions produced different final current states. The measured state library was used for visual feature construction: a simple multilayer perceptron achieved 96.06 ± 0.19% test accuracy for MNIST over five independent runs, while a hybrid representation achieved 98.26 ± 0.28% over five independent runs for four-frame trajectory recognition; ablation showed that device-state features preserved temporal-order information. These results support temporal-order-sensitive physical encoding in a simple transparent oxide device.

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ITO/SnO2/ITO光电突触器件的多波长光脉冲诱导时间态映射。

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来源期刊

Nanomaterials NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

8.50

自引率

9.40%

发文量

3841

审稿时长

14.22 days

期刊介绍： Nanomaterials (ISSN 2076-4991) is an international and interdisciplinary scholarly open access journal. It publishes reviews, regular research papers, communications, and short notes that are relevant to any field of study that involves nanomaterials, with respect to their science and application. Thus, theoretical and experimental articles will be accepted, along with articles that deal with the synthesis and use of nanomaterials. Articles that synthesize information from multiple fields, and which place discoveries within a broader context, will be preferred. There is no restriction on the length of the papers. Our aim is to encourage scientists to publish their experimental and theoretical research in as much detail as possible. Full experimental or methodical details, or both, must be provided for research articles. Computed data or files regarding the full details of the experimental procedure, if unable to be published in a normal way, can be deposited as supplementary material. Nanomaterials is dedicated to a high scientific standard. All manuscripts undergo a rigorous reviewing process and decisions are based on the recommendations of independent reviewers.