论文标题
非线性木元偏光子
Nonlinear magnon polaritons
论文作者
论文摘要
我们从实验和理论上证明非线性自旋波相互作用抑制了Yttrium Iron Garnet膜的微波谱中的杂化木磷酸化量或“木polariton”。我们观察到基特尔和微波腔模式之间的强耦合，这是避免的横穿作为低微波输入功率在磁场的函数方面的，但在高功率下的间隙完全缩小。实验结果通过理论模型很好地解释了，其中包括凯特尔镁的三麦克农衰变成旋转波。间隙闭合起源于SUHL不稳定性阈值上方的铁磁共振的饱和，这是由自旋波的一致反应。
We experimentally and theoretically demonstrate that nonlinear spin-wave interactions suppress the hybrid magnon-photon quasiparticle or "magnon polariton" in microwave spectra of an yttrium iron garnet film detected by an on-chip split-ring resonator. We observe a strong coupling between the Kittel and microwave cavity modes in terms of an avoided crossing as a function of magnetic fields at low microwave input powers, but a complete closing of the gap at high powers. The experimental results are well explained by a theoretical model including the three-magnon decay of the Kittel magnon into spin waves. The gap closure originates from the saturation of the ferromagnetic resonance above the Suhl instability threshold by a coherent back reaction from the spin waves.
