Hybrid magnonics has recently attracted intensive attentions as a promising platform for coherent information processing. In spite of its rapid development, on-demand control over the interaction of magnons with other information carriers, in particular microwave photons in electromagnonic systems, has been long missing, significantly limiting the potential broad applications of hybrid magnonics. Here, we show that by introducing Floquet engineering into cavity electromagnonics, coherent control on the magnon-microwave photon coupling can be realized. Leveraging the periodic temporal modulation from a Floquet drive, our first-of-its-kind Floquet cavity electromagnonic system enables the manipulation of the interaction between hybridized cavity electromagnonic modes. Moreover, we have achieved a new coupling regime in such systems: the Floquet ultrastrong coupling, where the Floquet splitting is comparable with or even larger than the level spacing of the two interacting modes, beyond the conventional rotating-wave picture. Our findings open up new directions for magnon-based coherent signal processing.

中文翻译：

---

浮球腔电磁

作为一种用于相干信息处理的有前途的平台，混合磁控技术最近已引起广泛关注。尽管其发展迅速，但长期以来一直缺少按需控制磁振子与其他信息载体（尤其是电磁系统中的微波光子）相互作用的能力，这极大地限制了混合磁振子的潜在广泛应用。在这里，我们表明，通过将Floquet工程引入腔电磁学中，可以实现对磁振子-微波光子耦合的相干控制。利用Floquet驱动器的周期性时间调制，我们首创的Floquet腔电磁系统可以操纵混合腔电磁模式之间的相互作用。此外，我们在此类系统中实现了新的耦合机制：Floquet超强耦合，其Floquet分裂与两种相互作用模式的水平间距相当甚至更大，超越了传统的旋转波图像。我们的发现为基于磁振子的相干信号处理开辟了新的方向。