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arXiv 2603.06115cond-mat.mes-hall
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相干声子-磁子耦合的相分辨成像

Phase-resolved imaging of coherent phonon-magnon coupling

Rheinland-Pfälzische Technische Universität Kaiserslautern-Landau(莱茵兰-普法尔茨技术大学凯泽斯劳滕-兰道校区);University of Groningen(格罗宁根大学);University of Augsburg(奥格斯堡大学)

Yannik Kunz, Florian Kraft, David Breitbach, Torben Pfeifer, Matthias Küß, Stephan Glamsch, Manfred Albrecht, Mathias Weiler

AI总结:

利用相分辨光学技术,研究SAWs驱动SWs的共振相干耦合,通过偏振依赖性分离信号并直接成像相干激发过程。

摘要:

我们采用一种直接的相分辨光学技术来研究通过共振磁弹性耦合由表面声波(SAWs)驱动的自旋波(SWs)的相干性。为此,我们使用了带有微图案化互易谐振换能器的压电锂 tantalate(LiTaO₃)基底,用于SAWs激发,该基底与在5纳米厚和20微米宽的Co₄₀Fe₄₀B₂₀波导中与SWs相互作用。我们利用相锁的微聚焦光学偏振检测实验来检测SAWs和SWs,并利用其特征偏振依赖性来分离SAWs和SW信号。我们的测量直接成像了由SAWs激发的SW的共振和相干激发。

英文摘要:

We use a direct phase-resolved optical technique to study the coherence of spin waves (SWs) that are driven by surface acoustic waves (SAWs) via resonant magnetoelastic coupling. For this, we employ a piezoelectric lithium tantalate (LiTaO$_{3}$) substrate, equipped with micropatterned interdigital transducers for SAW excitation, which interact with SWs in a 5 nm thin and 20 $μ$m wide Co$_{40}$Fe$_{40}$B$_{20}$-waveguide. We detect the SAW and the SW using a phase-locked micro-focused optical polarization detection experiment and use the characteristic polarization dependence to separate the SAW and SW signals. Our measurements directly image the resonant and coherent excitation of the SW by the SAW.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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