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• W3198828390 abstract "The typically nonlinear and asymmetric response of synaptic memristors to positive and negative electrical pulses makes the realization of accurate deep neural networks very challenging. Here, we integrate a two-terminal valence change memory (VCM) into a photonic/plasmonic circuit and show that the switching properties of this memristor become more gradual and symmetric under light irradiation. The added optical input acts on the VCM as a third, independent modulation channel. It locally heats the active area of the device, which enhances the generation of oxygen vacancies and broadens the resulting nanoscale conductive filaments. The measured conductance modulation of the VCM is then inserted into a neural network simulator. Using the MNIST data set of handwritten digits as an application, a light-enhanced recognition accuracy of 93.53% is demonstrated, similar to ideally performing memristors (94.86%) and much higher than those without light (67.37%). Notably, the optical signal does not increase the overall energy consumption by more than 3.2%. Finally, an approach to scale up our electro-optical technology is proposed, which could allow high-density, energy-efficient neuromorphic computing chips." @default.
• W3198828390 created "2021-09-13" @default.
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• W3198828390 date "2021-08-30" @default.
• W3198828390 modified "2023-10-01" @default.
• W3198828390 title "Analog Nanoscale Electro-Optical Synapses for Neuromorphic Computing Applications" @default.
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• W3198828390 doi "https://doi.org/10.1021/acsnano.1c04654" @default.
• W3198828390 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/34459580" @default.
• W3198828390 hasPublicationYear "2021" @default.
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