Strongly coupled magnon-phonon dynamics in a single nanomagnet
Strongly coupled magnon-phonon dynamics in a single nanomagnet
复制标题
DOI：
10.1038/s41467-019-10545-x
复制
发表时间：
2019-06-14
影响因子：
16.6
通讯作者：
Schmidt, Holger
中科院分区：
文献类型：
--
作者：
Berk, Cassidy;Jaris, Mike;Schmidt, Holger
极化激元由于其独特的性质而被广泛研究，具有重要的基础和技术意义。当光子与各种基元激发相互作用时，它们在半导体中得到了最广泛的研究。然而，其他强耦合激励表现出类似的动态。具体地说，当磁振子和声子模耦合时，可以形成杂化的磁振子-声子准粒子。在这里，我们报告在一个单一的薄镍纳米磁体耦合磁振子声子动力学的直接观察。我们开发了一个分析描述模型的动态在两个维度上，使我们能够隔离的参数影响的频率分裂。此外，我们证明了调谐的磁振子声子相互作用到强耦合制度通过所施加的磁场的方向。
Polaritons are widely investigated quasiparticles with fundamental and technological significance due to their unique properties. They have been studied most extensively in semiconductors when photons interact with various elementary excitations. However, other strongly coupled excitations demonstrate similar dynamics. Specifically, when magnon and phonon modes are coupled, a hybridized magnon-phonon quasiparticle can form. Here, we report on the direct observation of coupled magnon-phonon dynamics within a single thin nickel nanomagnet. We develop an analytic description to model the dynamics in two dimensions, enabling us to isolate the parameters influencing the frequency splitting. Furthermore, we demonstrate tuning of the magnon-phonon interaction into the strong coupling regime via the orientation of the applied magnetic field.