An optical synapse based on a polymer waveguide with a GST225 active layer

Abstract

This paper presents the results of an experimental study, implementation, and numerical simulation of the transmissivity of a polymer waveguide covered by a GST225 thin film with various phase states. The paper considers an optical synapse prototype based on the interface between the waveguide and an optically controlled GST225 film. We demonstrate the fundamental possibility of controlling an optical signal in the telecommunication C-range as it passes through the synaptic interface via the action of an external laser on an optically active GST225 film. Experimentally, 40% single- and multi-level modulations of the optical signal intensity are achieved. The numerical simulation results are in line with the experimental data. Based on this principle, next-generation all-optical storage and computing devices that simulate the properties of biological synapses and neurons can be developed.

Optical and optoelectronic neuromorphic devices based on emerging memory technologies

“…However, the fixed laser is indispensable to sustain the base even though the microfiber is absence of modulation, resulting in large energy consumption compared with other photonic devices. The nonvolatile phase change material may be a better alternative as the active layer, which is benefit from energy efficiency and storage speed [51].…”