Light-matter interaction plays a critical role for coherent information processing. Specifically, in magnetic materials, the interaction between collective spin excitations – known as spin waves or magnons – and microwave radiations have been attracting intensive attentions in recent years. Such interaction gives rise to a new type of hybrid system known as the electromagnonic system [1-5], which has exhibited extraordinary potentials for a broad range of applications including signal transduction, non-reciprocal signal routing, and quantum technology.
Despite its great potentials, current development of electromagnonic systems has been severely limited by the lack of tunability. In most existing demonstrations, the electromagnonic interactions are usually static or semi-static for a given device configuration, preventing further manipulation of the system dynamics. In this talk, I will present the novel approaches that we recently developed to control the electromagnonic interactions. Two approaches will be discussed, which provide in-situ tuning of the coupling strength (through temporal parametric modulation of the magnon medium)  and mode detuning (through local bias condition manipulation) , respectively. With proper device engineering, such tuning can be implemented with very short response times and large amplitudes, allowing real-time reconfigurability of the system and accordingly in-situ control of its dynamic responses. These new approaches not only introduce new physical principles but also have direct implications for practical applications in coherent signal processing, thus opening a new direction for advancing the field of hybrid magnonics.
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