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一个基于模拟模型的CSDG光电子晶体管模拟多巴胺促进的突触可塑性,用于高能效的神经形态系统

Qing-An Ding¹, Yuhua Gao¹, Chunyan Liu¹

¹School of Electronic and Information Engineering, Shandong University of Science and Technology, Qingdao, 266590 China.

Cognitive neurodynamics

|August 4, 2025

概括

本研究介绍了一种新型的圆柱形环绕双门纳米线晶体管,用于模拟短期记忆 (STM) 和突触功能. 该设备利用光刺激来加速神经计算系统的学习.

科学领域:

神经形态工程的神经形态工程
材料科学材料科学材料科学
设备物理设备物理

背景情况:

电荷陷晶体管对于模拟生物突触功能至关重要.
氧化-化-氧化 (SONOS) 结构在模拟短期记忆 (STM) 方面面临着挑战.
现有的突触晶体管难以复制复杂的突触可塑性,例如短期增强 (STP) 到长期增强 (LTP) 的过渡.

研究的目的:

提出一种能够模拟STM的新型突触晶体管设计.
用电脉冲研究突触功能的调制,包括STP-LTP过渡,使用电脉冲.
探索光辅助突触活动及其在神经计算中学习加速的潜力.

主要方法:

开发一个模拟模型的圆柱形环绕双门 (CSDG) 纳米线突触晶体管的模拟模型.
加入与通道直接接触的化 (Si3N4) 电荷陷层.
电脉冲的调节以模仿突触可塑性和对多巴胺动态的光刺激.

主要成果:

该CSDG纳米线晶体管成功模仿突触功能,包括STP到LTP过渡.
后突触反应显示了依赖光的变化,类似于多巴胺促进的突触活动.
对蓝光的高反应性验证了其在促进多巴胺分泌中的作用,模仿视网膜活动.

结论:

拟议的CSDG纳米线突触晶体管有效模拟STM和突触可塑性.
光刺激,特别是蓝光,增强突触活动,加速学习动态.
这项工作为开发具有改进学习能力的先进神经计算系统提供了基础.

关键词:

蓝光灯是蓝光的,它可以发出蓝光.在CSDG晶体管中.多巴胺是一种多巴胺.突触性可塑性突触性可塑性

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Long-term Potentiation

Long-term Potentiation

Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre- and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.

Long-term Potentiation

Long-term Potentiation

Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.
Hebbian LTP
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