Ultrafast interaction of the angular momentum of photons with spins in the metallic amorphous alloy GdFeCo.
Ultrafast interaction of the angular momentum of photons with spins in the metallic amorphous alloy GdFeCo.
复制标题
DOI：
10.1103/physrevlett.98.207401
复制
发表时间：
2007-05
影响因子：
8.6
通讯作者：
C. Stanciu;F. Hansteen;A. Kimel;A. Tsukamoto;A. Itoh;A. Kirilyuk;T. Rasing
中科院分区：
文献类型：
--
作者：
C. Stanciu;F. Hansteen;A. Kimel;A. Tsukamoto;A. Itoh;A. Kirilyuk;T. Rasing
利用超短激光脉冲研究了圆偏振光对亚铁磁金属GdFeCo自旋的影响。通过将样品转变为多畴状态，从而抑制光的加热效应的观察，我们已经能够证明自旋波的超快非热激发，其相位取决于光子的角动量。这些结果表明，在这种金属系统的磁化超快相干控制的可能性。
Ultrashort laser pulses have been used to study the effect of circularly polarized light on spins in the ferrimagnetic metal GdFeCo. By turning the sample into a multidomain state and thereby suppressing the observation of the heating effect of light, we have been able to demonstrate an ultrafast nonthermal excitation of spin waves with a phase that depends on the angular momentum of the photons. These results demonstrate the possibility of ultrafast coherent control of the magnetization in this metallic system.