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arXiv 2009.04557cond-mat.mtrl-sci
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偶极相互作用对腔磁振子极化激元的影响

Effect of dipolar interactions on cavity magnon-polaritons

Antoine Morin, Christian Lacroix, David Ménard

摘要:

在两个钇铁石榴石(YIG)球之间存在强相互偶极作用的情况下,研究了电磁腔与两个球之间的强光子-磁振子耦合。随着球间距的减小,YIG球与电磁腔之间的耦合强度减小,总磁损耗增大。一个模型的非均匀加宽的铁磁共振线宽,部分减轻了偶极窄化效应,再现实验观察到的耦合强度的减少。这些发现对于理解强耦合光子-磁振子系统具有重要意义,该系统涉及密集的磁性物体,例如铁磁纳米线阵列,其中与电磁腔的总耦合强度可能由于相互偶极相互作用而变得有限。

英文摘要:

The strong photon-magnon coupling between an electromagnetic cavity and two yttrium iron garnet (YIG) spheres has been investigated in the context of a strong mutual dipolar interaction between the spheres. A decrease in the coupling strength between the YIG spheres and the electromagnetic cavity is observed, along with an increase of the total magnetic losses, as the distance between the spheres is decreased. A model of inhomogeneous broadening of the ferromagnetic resonance linewidth, partly mitigated by the dipolar narrowing effect, reproduces the reduction in the coupling strength observed experimentally. These findings have important implications for the understanding of strongly coupled photon-magnon system involving densely packed magnetic objects, such as ferromagnetic nanowires arrays, in which the total coupling strength with an electromagnetic cavity might become limited due to mutual dipolar interactions.

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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