Department of Physics and Astronomy, University of Sheffield, Sheffield, United Kingdom.
Phys Rev Lett. 2011 Jun 24;106(25):257401. doi: 10.1103/PhysRevLett.106.257401. Epub 2011 Jun 22.
A key property of equilibrium exciton-polariton condensates in semiconductor microcavities is the suppression of the Zeeman splitting under a magnetic field. By studying magnetophotoluminescence spectra from a GaAs microcavity, we show experimentally that a similar effect occurs in a nonequilibrium polariton condensate arising from polariton parametric scattering. In this case, the quenching of Zeeman splitting is related to a phase synchronization of spin-up and spin-down polarized polariton condensates caused by a nonlinear coupling via the coherent pump state.
半导体微腔中平衡激子极化激元凝聚体的一个关键性质是在磁场下抑制塞曼分裂。通过研究来自 GaAs 微腔的磁光荧光光谱，我们实验证明，在源于极化激元参量散射的非平衡极化激元凝聚体中也会发生类似的效应。在这种情况下，塞曼分裂的猝灭与通过相干泵浦态的非线性耦合引起的自旋向上和自旋向下极化极化激元凝聚体的相位同步有关。
