Oxide-Based Optical Synapses with Low Consumption for In-Sensor Reservoir Computing

In this work, we propose a two-terminal ITO/NiO/HfO 2 /Pd optical synapse that has tunable temporal dynamics under light stimuli. The optical synapse exhibits light intensity and frequency-dependent nonlinear synaptic short-term plasticity (STP) at a low read voltage of 0.05 V, indicating the potent...

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Bibliographic Details
Published in2025 9th IEEE Electron Devices Technology & Manufacturing Conference (EDTM) pp. 1 - 3
Main Authors Zhou, Jingyi, Jiang, Biyi, Tang, Huansong, Wang, Zhen
Format Conference Proceeding
LanguageEnglish
Published IEEE 09.03.2025
Subjects
Noise reduction
Nonlinear dynamical systems
Nonlinear optical devices
Nonlinear optics
Optical devices
Optical noise
Optical Synaptic Device
Oxide-Based Memristor
Power demand
Reservoir computing
Synapses
Voltage
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DOI10.1109/EDTM61175.2025.11040532

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Summary:In this work, we propose a two-terminal ITO/NiO/HfO 2 /Pd optical synapse that has tunable temporal dynamics under light stimuli. The optical synapse exhibits light intensity and frequency-dependent nonlinear synaptic short-term plasticity (STP) at a low read voltage of 0.05 V, indicating the potential for achieving in-sensor reservoir computing (RC) with reduced power consumption. The RC system, utilizing our optical synapses, can operate at an ultra-low energy consumption level of 15 fJ while achieving a remarkably high recognition accuracy of 95.95 %.
DOI:10.1109/EDTM61175.2025.11040532