标题： 在法拉第几何中于磁场下调谐量子阱激子-极化激元的激光阈值：一项理论研究 显示英文标题

标题： Tuning the lasing threshold of quantum well exciton-polaritons under a magnetic field in Faraday geometry: a theoretical study

摘要： 极化子激光是一种有前景的现象，在无需粒子数反转的下一代激光器中有潜在应用。 在量子阱（QW）上施加垂直磁场会显著改变激子-极化子的性质。 在这项理论研究中，我们探讨了量子阱激子-极化子的激光阈值如何依赖于磁场。 通过修改激子的有效质量和拉比劈裂，磁场诱导了松弛动力学的显著变化，这直接影响了激光阈值。 对于低能泵浦，磁场的增加推迟了激光阈值，而对于高能泵浦，阈值在更低的泵浦强度下达到。 此外，增加泵浦能量和磁场增强了松弛效率，导致凝聚的极化子数量大幅增加。 我们的结果为通过磁场调节激子-极化子凝聚提供了见解，并可能对低阈值极化子激光器的设计产生影响。 显示英文摘要

摘要： Polariton lasing is a promising phenomenon with potential applications in next-generation lasers that operate without the need for population inversion. Applying a perpendicular magnetic field to a quantum well (QW) significantly alters the properties of exciton-polaritons. In this theoretical study, we investigate how the lasing threshold of QW exciton-polaritons depends on the magnetic field. By modifying the exciton's effective mass and Rabi splitting, the magnetic field induces notable changes in the relaxation kinetics, which directly affect the lasing threshold. For low-energy pumping, an increase in the magnetic field delays the lasing threshold, while for high-energy pumping, the threshold is reached at much lower pump intensities. Furthermore, increasing both the pump energy and the magnetic field enhances relaxation efficiency, leading to a substantially larger number of condensed polaritons. Our result gives insights into the modulation of exciton-polariton condensation through magnetic fields, with potential implications for the design of low-threshold polariton lasers.