Detection and storage of different light information using electronic devices are important to emulate image information learning and memory functions like the human visual system. In this work, the controllable light‐tunable synaptic memory behaviors are demonstrated utilizing photodetector in series with memristor (composite memristor). In other words, the composite memristor has the detection‐storage function to different light information, realizing visual memory simulation. Herein, a new synaptic device with inherent learning and memory functions is realized based on a pn heterostructure memristor. A depletion‐region width modulation model is proposed to explain the memory characteristics. Several essential synaptic functions are imitated. Further, the visual memory array system is built to accomplish the detection and memory processes of patterned light distribution. Importantly, different light information induces different pattern memory characteristics like human eyes. This composite memristor provides a new idea for wider waveband, greater detection range, and more realistic multifunctional electronic eyes.

中文翻译：

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建立用于视觉记忆仿真的光刺激突触记忆设备

使用电子设备检测和存储不同的光信息对于模拟图像信息的学习和记忆功能（如人类视觉系统）非常重要。在这项工作中，利用与忆阻器（复合忆阻器）串联的光电探测器演示了可控的光可调突触记忆行为。换句话说，复合忆阻器对不同的光信息具有检测存储功能，实现了视觉记忆仿真。在此，基于pn异质结构忆阻器，实现了具有固有学习和记忆功能的新型突触装置。提出了耗尽区宽度调制模型来解释存储特征。模仿了一些基本的突触功能。进一步，建立视觉存储阵列系统以完成图案化光分布的检测和存储过程。重要的是，不同的光信息会引起人眼不同的模式记忆特征。这种复合忆阻器为更宽的波段，更大的检测范围和更逼真的多功能电子眼提供了新的思路。