标题： 超快磁弹性探测表面声学瞬态 显示英文标题

标题： Ultrafast Magnetoelastic Probing of Surface Acoustic Transients

摘要： 我们在镍薄膜中使用全光学瞬态光栅技术产生面内磁弹性波。 当在非晶玻璃基底上进行时，两种主要的磁弹性激发可以通过潜在的弹性畸变被共振驱动，即瑞利表面声波和表面掠射纵向波。 施加的磁场方向在样品平面内，可以选择性地调节磁振荡与其中一种弹性波之间的耦合，从而展示了共存的大振幅磁弹性波的选择性激发。 基于格林函数方法的解析计算证实了非平衡表面声学瞬态的产生。 显示英文摘要

摘要： We generate in-plane magnetoelastic waves in nickel films using the all-optical transient grating technique. When performed on amorphous glass substrates, two dominant magnetoelastic excitations can be resonantly driven by the underlying elastic distortions, the Rayleigh Surface Acoustic Wave and the Surface Skimming Longitudinal Wave. An applied field, oriented in the sample plane, selectively tunes the coupling between magnetic precession and one of the elastic waves, thus demonstrating selective excitation of coexisting, large amplitude magnetoelastic waves. Analytical calculations based on the Green's function approach corroborate the generation of the non-equilibrium surface acoustic transients.