论文标题
在Terahertz Magnon Polaritons中从弱耦合到强耦合的磁连续过渡
Magnetically Tuned Continuous Transition from Weak to Strong Coupling in Terahertz Magnon Polaritons
论文作者
论文摘要
根据耦合和耗散的相对速率，在弱耦合方面或强耦合方案中，光耦合系统要么是。在这里，我们提出了一个独特的系统，其中耦合速率随着外部施加的磁场连续增加，而耗散速率保持恒定，从而使我们能够监视弱到较强的耦合跃迁，这是磁场的函数。我们观察到terahertz木元素模式在iTtrium orthoferrite中的狂犬病分裂，高于〜14 t的阈值磁场。基于显微镜理论模型，我们表明，随着磁场的增加，磁场将通过一个非凡的点向木polaritons过渡到木polaritons，这将为非荷马素系统的现场控制提供新的机会。
Depending on the relative rates of coupling and dissipation, a light-matter coupled system is either in the weak- or strong-coupling regime. Here, we present a unique system where the coupling rate continuously increases with an externally applied magnetic field while the dissipation rate remains constant, allowing us to monitor a weak-to-strong coupling transition as a function of magnetic field. We observed a Rabi splitting of a terahertz magnon mode in yttrium orthoferrite above a threshold magnetic field of ~14 T. Based on a microscopic theoretical model, we show that with increasing magnetic field the magnons transition into magnon polaritons through an exceptional point, which will open up new opportunities for in situ control of non-Hermitian systems.
