Abstract
We studied optical response of microcavity non-equilibrium exciton-polariton Bose-Einstein condensate with saturable nonlinearity under simultaneous resonant and non-resonant pumping. We demonstrated the emergence of multistabile behavior due to the saturation of the excitonic absorption. Stable periodic Rabi-type oscillations of the excitonic and photonic condensate components in the regime of the stationary pump and their transition to the chaotic dynamics through the cascade of Hopf bifurcations by tuning of the electrical pump are revealed.
Highlights
Exciton-polaritons are quasiparticles emerging due to the strong coupling between quantum well excitons and cavity photons in high quality factor cavities [1]. Due to their hybrid lightmatter nature, polaritons exhibit set of intriguing collective effects such as high temperature Bose-Einstein condensation (BEC) [3], superfluidity [4] and macroscopic self trapping [5]
Those phenomena originate from very small effective mass of polaritons inherited from the photonic component combined with strong polariton- polariton interactions provided by the excitonic component
Together with the intriguing fundamental properties, exciton-polaritons are attractive for their perspective applications, mainly in the field of low-threshold bosonic lasers [6] and all-optical integrated circuits [7, 8, 9, 10, 11, 12, 13, 14]
Summary
Exciton-polaritons are quasiparticles emerging due to the strong coupling between quantum well excitons and cavity photons in high quality factor cavities [1]. In this paper we examine the problem of the onset of permanent Rabi oscillations between excitonic and photonic components in the microcavity in the presence of strong nonlinearities caused by both exciton-exciton interaction and saturation of the excitonic absorbtion provided by the effects of Pauli blocking [23, 24, 25, 26]. The latter plays major role in the regime of very strong pumps.
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