多模腔磁振子系统中的耦合相位干涉效应
Coupling phase interference effects in a multimode cavity magnonics system
AI总结：
研究多模腔磁振子系统中耦合相位干涉效应，用考虑内外部耦合相位的输入-输出模型，与实验微波传输测量一致，揭示位置依赖解耦模式及反共振频率处大非互易性，建立耦合相位工程原则。
AI中文摘要：
耦合相位在腔磁振子中起决定性作用，但常被忽视，尤其是在复杂多模系统中。本文研究了一个由四柱重入式微波腔与钇铁石榴石（YIG）球耦合而成的腔磁振子系统中的相位介导干涉效应。使用明确考虑内部和外部耦合相位的输入-输出模型，实现了与实验微波传输测量的一致。结果揭示了由于腔光子-磁子（内部）耦合相位干涉而出现的位置依赖解耦模式。此外，在反共振频率处实验观察到了大的非互易性，表明该特征是由于远失谐模式的奇宇称腔光子-探针（外部）耦合相位与内部耦合相位干涉所致。这些结果建立了耦合相位工程作为精确建模和设计多模腔磁振子器件的关键原则。
英文摘要：
Coupling phases play a decisive yet often overlooked role in cavity magnonics, particularly in complex multimode systems. Here, we investigate phase-mediated interference effects in a cavity magnonics system comprising a four-post re-entrant microwave cavity coupled to Yttrium Iron Garnet (YIG) spheres. Using an input-output model that explicitly accounts for both internal and external coupling phases, we achieve agreement with experimental microwave transmission measurements. Our results unravel the emergence of a positionally-dependent uncoupled mode due to interference of cavity photon-magnon (internal) coupling phases. Further, we experimentally observed large nonreciprocity at the antiresonance frequencies and show that this feature arises due to the far-detuned modes' odd parity cavity photon-probe (external) coupling phase interfering with the internal coupling phases. Bridging theory, simulation and experiment, these results establish coupling-phase engineering as a key principle for accurately modeling and designing multimode cavity magnonics devices.
