Modulation of the plasticity of an all-metal oxide synaptic transistor via laser irradiation
| Autor: | Jinsong Huang, Tailiang Guo, Dongxu Lv, Qian Yang, Huipeng Chen, Jinwei Chen |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Neural facilitation Bioengineering 02 engineering and technology 010402 general chemistry 01 natural sciences law.invention Synaptic weight law General Materials Science Electrical and Electronic Engineering business.industry Mechanical Engineering Transistor Long-term potentiation General Chemistry 021001 nanoscience & nanotechnology Laser 0104 chemical sciences Neuromorphic engineering Mechanics of Materials Modulation Excitatory postsynaptic potential Optoelectronics 0210 nano-technology business |
| Zdroj: | Nanotechnology. 31(21) |
| ISSN: | 1361-6528 |
| Popis: | Artificial intelligence devices that can mimic human brains are the foundation for building future artificial neural networks. A key step in mimicking biological neural systems is the modulation of synaptic weight, which is mainly achieved by various engineering approaches using material design, or modification of the device structure. Here, we realize the modulation of the synaptic weight of a Ta2O5/ITO-based all-metal oxide synaptic transistor via laser irradiation. Prior to the deposition of the active layer and electrodes, a femtosecond laser was used to irradiate the surface of the insulator layer. Typical synaptic characteristics such as excitatory postsynaptic current, paired pulse facilitation and long-term potentiation were successfully simulated under different laser intensities and scanning rates. In particular, we demonstrate for the first time that laser irradiation could control the quantity of oxygen vacancies in the Ta2O5 thin film, leading to precise modulation of the synaptic weight. Our research provides an instantaneous ( |
| Databáze: | OpenAIRE |
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