Floquet engineering has recently been recognized as an important tool for manipulating the coherent magnon-photon interaction in cavity electromagnonics systems at microwave frequencies. In spite of the novel hybrid magnonic functionalities that have been demonstrated, the effect of the Floquet drive has been relatively weak due to the limited driving efficiency, limiting its broader application. This work shows that, both experimentally and theoretically, the Floquet drive in our cavity electromagnonic device can be drastically enhanced by utilizing $LC$ resonances, giving rise to drastically boosted interaction between hybrid modes with fundamentally different spectral characteristics compared with previous demonstrations. In addition, the Floquet drives can also be obtained from gigahertz signals on such a system, allowing the demonstration of more advanced signal operations. Our resonance-enhanced Floquet cavity electromagnonics points to a promising direction to fully unleash the potential of Floquet hybrid magnonics.

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• Magnons
• Quantum information with hybrid systems
• Spin optoelectronics
• Spin waves
• Floquet systems
• Transducers
• Cavity resonators
• Microwave techniques