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Leaky Integrate‐and‐Fire Mechanism in Exciton–Polariton Condensates for Photonic Spiking Neurons
Author(s) -
Tyszka Krzysztof,
Furman Magdalena,
Mirek Rafał,
Król Mateusz,
Opala Andrzej,
Seredyński Bartłomiej,
Suffczyński Jan,
Pacuski Wojciech,
Matuszewski Michał,
Szczytko Jacek,
Piętka Barbara
Publication year - 2023
Publication title -
laser and photonics reviews
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.778
H-Index - 116
eISSN - 1863-8899
pISSN - 1863-8880
DOI - 10.1002/lpor.202100660
Subject(s) - exciton , photonics , polariton , neuromorphic engineering , photon , physics , optoelectronics , ultrashort pulse , laser , photoluminescence , mechanism (biology) , biophotonics , optics , condensed matter physics , quantum mechanics , computer science , machine learning , artificial neural network
This paper introduces a new approach to neuromorphic photonics in which microcavities exhibiting strong exciton–photon interaction may serve as building blocks of optical spiking neurons. The experimental results demonstrate the intrinsic property of exciton–polaritons to resemble the Leaky Integrate‐and‐Fire (LIF) spiking mechanism. It is shown that exciton–polariton microcavities when non‐resonantly pumped with a pulsed laser exhibit leaky integration due to relaxation of the excitonic reservoir, threshold‐and‐fire mechanism due to transition to Bose–Einstein Condensate (BEC), and resetting due to stimulated emission of photons. These effects, evidenced in photoluminescence characteristics, arise within sub‐ns timescales. The presented approach provides means for ultrafast processing of spike‐like laser pulses with energy efficiency at the level below 1 pJ per spike.