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We observe a strong variation of the Zeeman splitting of exciton polaritons in microcavities when switching between the linear regime, the polariton lasing, and photon lasing regimes. In the polariton lasing regime the sign of Zeeman splitting changes compared to the linear regime, while in the photon lasing regime the splitting vanishes. We additionally… (More)
Light amplification by stimulated emission of radiation, well-known for revolutionising photonic science, has been realised primarily in fermionic systems including widely applied diode lasers. The prerequisite for fermionic lasing is the inversion of electronic population, which governs the lasing threshold. More recently, bosonic lasers have also been… (More)
We report exciton-polariton laser operation under electrical pumping. The hybrid light-matter nature of this lasing system is probed by measuring the exciton-polariton Zeeman-splitting, which clearly reveals that this laser remains in the strong coupling regime.