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以光遗传学为灵感,利用全光控制的memristors对突触记忆进行操纵.

Qihao Sun1,2,3, Zhecheng Guo1, Xiaojian Zhu2,3

  • 1Faculty of Electrical Engineering and Computer Science, Ningbo University, Ningbo 315211, P. R. China. zhangyuejun@nbu.edu.cn.

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|May 30, 2023
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概括

这项研究引入了一种用于人工突触的全光学记忆器,使光控制的记忆功能成为可能. 这一突破为可重新配置的人工神经系统和先进的神经形态计算铺平了道路.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 神经科学是一个神经科学.
  • 电气工程 电气工程

背景情况:

  • 光遗传技术使人工神经系统的基于光的控制成为可能,但大多数memristor都需要光和电信号.
  • 现有的光电子记忆器经常与仅基于光的,可逆的记忆状态控制作斗争,限制了光遗传学模拟.
  • 开发纯光学控制对于推进人工突触功能和神经形态计算至关重要.

研究的目的:

  • 开发一个全光学控制的光电子记忆器来模拟光遗传学调节的突触可塑性.
  • 为了研究该设备模拟仅使用光线的记忆形成和删除的能力.
  • 为了证明光可重新配置的人工神经系统的潜力.

主要方法:

  • 使用Au/Cs2AgBiBr6/Au结构制造一个全光学控制的光电子记忆器.
  • 在不同光波长下的持久光导效应的表征.
  • 使用光照明模拟激发性和抑制性突触可塑性和记忆效应.
  • 构建一个原型的光电子突触阵列,用于内存植入,删除和修改.

主要成果:

  • Au/Cs2AgBiBr6/Au记忆器证明了仅仅通过光对记忆状态的可逆控制.
  • 观察到正面和负面的持久光导效应,归因于界面上的光调节载体动态.
  • 该设备在光线下成功模拟了激发性和抑制性突触可塑性和记忆功能.
  • 一个原型的突触阵列展示了全光学记忆植入,擦除和修改,展示了光可重新配置的认知.

结论:

  • 开发的全光学记忆器有效地模仿了光遗传学调节的突触行为.
  • 这项技术为创建高度可重配置的人工神经系统提供了一条途径.
  • 这些发现支持神经形态计算和机器视觉应用的进步.