Detecting Phase-Resolved Magnetization Dynamics by Magneto-Optic Effects at 1550 nm Wavelength
Detecting Phase-Resolved Magnetization Dynamics by Magneto-Optic Effects at 1550 nm Wavelength
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DOI：
10.1109/tmag.2020.3013063
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发表时间：
2021-02
影响因子：
2.1
通讯作者：
Y. Xiong;Yi Li;Rao Bidthanapally;J. Sklenar;Mouhamad Hammami;Sawyer Hall;Xufeng Zhang;Peng Li
中科院分区：
文献类型：
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作者：
Y. Xiong;Yi Li;Rao Bidthanapally;J. Sklenar;Mouhamad Hammami;Sawyer Hall;Xufeng Zhang;Peng Li
我们演示了利用组合磁光Kerr效应和Faraday效应检测相分辨磁化动力学。该方法使用连续波激光器，在自旋动态频率上进行幅度调制，从而允许对自旋动力学进行相干跟踪，类似于“锁定”型测量。特别是，我们的方法利用单一的1550 nm波长，同时探测了YIG-Py异质结中Y3Fe5O12(YIG)和坡莫合金(Py=Ni80Fe20)的铁磁(FM)共振。基于光纤的磁光组件还具有制造成紧凑型、台式甚至便携式系统的优势，具有强大的测量性能。我们相信，我们的方法将有助于研究混合量子磁子系统和/或研究包括FM绝缘体和金属在内的纳米磁体结构中的相分辨自旋动力学。
We demonstrate the detection of phase-resolved magnetization dynamics with combinatorial magneto-optic Kerr and Faraday effects. The method uses a continuous-wave laser that is amplitude-modulated at the spin dynamic frequencies and thus allows for coherent tracking of the spin dynamics, akin a “lock-in”-type measurement. In particular, our method, using a single 1550 nm wavelength, probes simultaneously the ferromagnetic (FM) resonance of Y3Fe5O12 (YIG) and Permalloy (Py = Ni80Fe20) in a YIG-Py heterostructure. The fiber-based magneto-optic components also have the advantage of being made into a compact, tabletop or even portable system with yet robust measurement performances. We believe that our method will be found useful in studying hybrid quantum magnonic systems and/or investigating phase-resolved spin dynamics in nanomagnet structures involving both FM insulators and metals.