Spin-dependent polariton condensates (B07)

本计画的目标将是在光学上创造出具有上级性质的极化激元凝聚体。为此，我们将使用暗激子，因为它们的寿命超过极化激元的寿命三个数量级，并且它们不会直接改变极化激元的布居动力学。在详细描述了暗激子在共振和非共振激发下的特性之后，我们将把它们应用于含有稀磁半导体量子威尔斯的腔结构中的极化激元，这提供了一种可调谐的极化激元自旋分裂。两者的结合将使我们能够光学控制极化激元的自旋状态。

Target of this project will be the optical creation of tailored potentials with superior properties for polariton condensates. To this end, we will employ dark excitons because their lifetime exceeds the lifetime of polaritons by three orders of magnitude and they do not alter the polariton population dynamics directly. After a detailed characterization of dark exciton properties both for resonant and non-resonant excitation, we will apply them to polaritons in cavity structures containing diluted magnetic semiconductor quantum wells, which offer a tunable polariton spin splitting. The combination of both will allow us to control the spin state of polaritons optically.