Recognition of optical patterns directly irradiated to a three-dimensional silver sulfide physical reservoir

Abstract In recent years, physical reservoirs have garnered attention for their low power consumption and computational cost. Among them, three-dimensional systems have been shown to enhance performances in nonlinear transformation and short-term memorization compared to two-dimensional systems. Such studies using three-dimensional physical reservoirs remain limited although two-dimensional physical reservoirs have been used to demonstrate various applications. In this study, we demonstrated the ability to recognize optical patterns directly irradiated to a three-dimensional silver sulfide reservoir. The three-dimensionalization enabled simultaneous irradiation and recognition of optical patterns to different sides. In this task, we achieved over 80% accuracy on average for 16-pattern classification, demonstrating the potential application of three-dimensional physical reservoirs.