Driven-dissipative confined polariton condensate under magnetic field
Sturm, C. · Solnyshkov, D. · Krebs, O. · Lemaître, A. · Sagnes, I. · Galopin, E. · Amo, A. · Malpuech, G. · Bloch, J.
Original · EN
We investigate exciton-polariton condensation under magnetic field in a single high-quality semiconductor micropillar cavity. We observe successive polariton condensation of each spin component for two distinct threshold powers. Pronounced and non-monotonous variations of both the Zeeman splitting and the circular polarization of the emission are measured across these two condensation thresholds. This unexpected behavior deeply deviates from the so-called spin Meissner effect predicted for a fully thermalized system. Our measurements can be understood in a kinetic approach taking into account spin-anisotropic interactions within the entire system: the polariton condensate and the cloud of uncondensed excitons.
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