Multifrequency Floquet Engineering of Magnon Polaritons
The research demonstrates Floquet engineering of cavity magnon-polaritons by periodically modulating microwave cavity frequency instead of magnetic fields, allowing for large modulation depth and bandwidth. By applying commensurate two-frequency drives (higher frequency at twice or three times the lower), the resulting energy spectrum is shown to depend critically on the relative amplitude and phase of these tones, offering a new way to manipulate hybrid system quasi-energy levels.