论文标题
通过晶体生长优化，从旋转Fe/pt发射器发射的Thz发射增强
Enhanced THz emission from spintronic Fe/Pt emitters through crystal growth optimization
论文作者
论文摘要
我们研究了铁磁/非磁金属异质结构的THZ发射特性，重点是薄的Fe/Pt双层。特别是，我们报告了外延铁层优化晶体生长对THZ发射振幅和光谱带宽的影响。我们证明了发射强度的增强以及发射带宽的扩展。两者都与减少的自旋散射和更高的界面传输有关。我们的工作提供了一种基于外延Fe的最佳自旋THZ发射器的途径。它还强调了如何利用THZ发射测量来表征由微妙的结构改进驱动的金属异质结构中非平衡旋转电流动力学的变化。
We investigate the THz emission characteristics of ferromagnetic/non-magnetic metallic heterostructures, focusing on thin Fe/Pt bilayers. In particular, we report on the impact of optimized crystal growth of the epitaxial Fe layers on the THz emission amplitude and spectral bandwidth. We demonstrate an enhancement of the emitted intensity along with an expansion of the emission bandwidth. Both are related to reduced spin scattering and higher interface transmission. Our work provides a pathway for devicing optimal spintronic THz emitters based on epitaxial Fe. It also highlights how THz emission measurements can be utilized to characterize the changes in out-of-equilibrium spin current dynamics in metallic heterostructures, driven by subtle structural refinement.
