论文标题
磁传感器的声频乘法和纯第二个谐波产生声子
Acoustic Frequency Multiplication and Pure Second Harmonic Generation of Phonons by Magnetic Transducers
论文作者
论文摘要
我们通过微波驱动时通过相邻磁传感器的铁磁共振来预测介电底物中表面声波的频率乘法。我们发现纯磁性纳米线没有任何线性和第三个谐波组件，发现纯第二次谐波生成（SHG）。通过改变电线的饱和磁化方向或在通过磁性纳米盘泵送时，将SHG和线性声子抽水切换。我们以与线性响应相当的幅度以及独特的非磁子传输的幅度相当地解决了SHG的高效率，在不同的声子谐波中非常不同。通过微波驱动的这种声频梳应为微型的声音和自旋设备带来前所未有的可调性。
We predict frequency multiplication of surface acoustic waves in dielectric substrates via the ferromagnetic resonance of adjacent magnetic transducers when driven by microwaves. We find pure second harmonic generation (SHG) without any linear and third harmonic components by a magnetic nanowire. The SHG and linear phonon pumping are switched by varying the saturated magnetization direction of the wire, or resolved directionally when pumped by magnetic nano-disc. We address the high efficiency of SHG with comparable magnitude to that of linear response, as well as unique non-reciprocal phonon transport that is remarkably distinct in different phonon harmonics. Such acoustic frequency comb driven by microwaves should bring unprecedented tunability for the miniaturized phononic and spintronic devices.
