Multiwavelength Optical Pulse-Induced Temporal State Mapping in an ITO/SnO2/ITO Optoelectronic Synaptic Device
- 1State Key Laboratory of Integrated Optoelectronics, Key Laboratory of UV Light-Emitting Materials and Technology of Ministry of Education, Northeast Normal University, Changchun 130024, China
- 2Laboratory of Neuromorphic Memristor Computing, College of Physical Science and Technology, Bohai University, Jinzhou 121000, China
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.
Related
- Experimental and computational analysis of the nonlinear optical responses of styrylquinoline-functionalized polymers for optoelectronic applications
- Tailoring the Structural, Optical, and Electrical Performance of PVA Through Sn0.8Mn0.2S Nanostructures Incorporation for Optoelectronic Applications
- First‐Principles Design of Cubic Spinel ZnIn ₂ S ₄ With Enhanced Carrier Transport, Optical Response, and Mechanical Stability for Photocatalytic and Optoelectronic Applications
- Air-annealing-induced vertical elemental gradients regulate defect chemistry and optoelectronic properties of cylindrical-target-sputtered ITO thin films
- Stress induced semiconductor to semimetal transition and tunable optical anisotropy in puckered bilayer GeTe: a first-principles study
BibTeX
@article{zhuang2026multiwavelength,
title = {{Multiwavelength Optical Pulse-Induced Temporal State Mapping in an ITO/SnO2/ITO Optoelectronic Synaptic Device}},
author = {Senyu Zhuang and Zhuang Hou and Shuqi Teng and Yingqi Zhao and Yongqi Song and Xuanyu Shan and Meng Qi and Mingan Luan and Ye Tao},
journal = {Nanomaterials (Basel, Switzerland)},
year = {2026},
month = oct,
doi = {10.3390/nano16191268},
url = {https://europepmc.org/article/PMC/PMC13667160},
note = {CC BY},
}
RIS
TY - JOUR
TI - Multiwavelength Optical Pulse-Induced Temporal State Mapping in an ITO/SnO2/ITO Optoelectronic Synaptic Device
AU - Senyu Zhuang
AU - Zhuang Hou
AU - Shuqi Teng
AU - Yingqi Zhao
AU - Yongqi Song
AU - Xuanyu Shan
AU - Meng Qi
AU - Mingan Luan
AU - Ye Tao
PY - 2026
DA - 2026/10/01
JO - Nanomaterials (Basel, Switzerland)
DO - 10.3390/nano16191268
UR - https://europepmc.org/article/PMC/PMC13667160
AB - 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.
SN - 2079-4991
ER -