Abstract
Micropillar lasers with integrated saturable absorber (SA) have been demonstrated to show important neuromimetic properties such as ultrafast excitable behavior, temporal summation, relative and absolute refractory periods and spike latency [1-4]. It has been observed that living nervous systems have recurrent loops involving two or more neurons in regions essential for memory [5]. We recreate s uch recurrent connection in our photonic system with the help of a delayed optical feedback. We study experimentally and theoretically the dynamics of the micropillar laser with SA with delayed optical feedback and demonstrate two distinct regimes: in the short term this system can store a great variety of temporal spike patterns, whereas in the long term only specific patterns can be stored, giving rise to an associative memory.
© 2019 IEEE
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