Optically stimulated synaptic devices based on silicon-tin alloyed thin film

Wenrui Xu; Nasir Ilyas; Hong Zhuo Gao; Wei Li; Xiang Dong Jiang

doi:10.1117/12.2606806

1 November 2021 Optically stimulated synaptic devices based on silicon-tin alloyed thin film

Wenrui Xu, Nasir Ilyas, Hong Zhuo Gao, Wei Li, Xiang Dong Jiang

Proceedings Volume 12057, Twelfth International Conference on Information Optics and Photonics; 1205741 (2021) https://doi.org/10.1117/12.2606806
Event: Twelfth International Conference on Information Optics and Photonics, 2021, Xi'an, China

Abstract

The implementation of biological synapses onto a hardware platform is an important step toward neuromorphic electronics. However, to replicate biological functions, electronic synapses still have to be reliant on the electric field, or the output of synaptic devices is photonic rather than an electronic synapse. Therefore, the development of optoelectronic synapses with optically stimulated fidelity and flexibility for information sensing and memory processes is a big step toward next-generation computing systems. Herein, the implementation of optical sensing and synaptic functionalities combined has been demonstrated in an artificial optoelectronic synapse based on a silicon-tin alloyed film. The synaptic device can mimic versatile light-stimulated synaptic neuromorphic functions, including excitatory postsynaptic current (ESPC), paired-pulse facilitation (PPF), short-term plasticity (STP), long-term plasticity (LTP), and learning experience. Furthermore, the mimicry of the human visual system is achieved based on these synaptic neuromorphic functions. In addition, the silicon-tin thin film with increased optical absorption provides photonic memory (PM) function under very low light intensity, showing great potential in light-stimulated neuromorphic applications.

Citation Download Citation

Wenrui Xu, Nasir Ilyas, Hong Zhuo Gao, Wei Li, and Xiang Dong Jiang "Optically stimulated synaptic devices based on silicon-tin alloyed thin film", Proc. SPIE 12057, Twelfth International Conference on Information Optics and Photonics, 1205741 (1 November 2021); https://doi.org/10.1117/12.2606806

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KEYWORDS

Optoelectronics

Optoelectronic devices

Silicon

Interfaces

Thin films

Computing systems

Scanning tunneling microscopy

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