In-situ control of system dynamics is critical for coherent information processing, but it has been challenging for the emerging field of hybrid magnonics, thus limiting its potential applications. This work will show novel approaches to introduce dynamical control in conventional hybrid magnonic devices. Using fast temporal modulation in system parameters such as the bias field, real-time tuning of the coherent magnon-microwave photon coupling can be obtained at time scales that are much shorter than the magnon and photon lifetimes. This allows real-time control of the coherent information exchange between magnons and microwave photons.
Coherent interaction between a single magnon mode and multiple phonon modes is demonstrated on hybrid magnonic device made of ferrimagnetic thin films. Thanks to the high crystalline quality of the thin film, both magnon and phonon modes have very low losses that are comparable to their coupling strengths. This ensures excellent coherence in their interaction, allowing the observation of coherent phenomena such as pulse echo.
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