Control of the Magnon-Photon Level Attraction in a Planar Cavity

A resistive coupling circuit is used to model the recently discovered dissipative coupling in a hybridized cavity photon-magnon system. With this model as a basis we design a planar cavity in which a controllable transition between level attraction and level repulsion can be achieved. This behavior can be quantitatively understood using an LCR-circuit model with a complex coupling strength. Our work therefore develops and verifies a circuit method to model level repulsion and level attraction and confirms the universality of dissipative coupling in the cavity photon-magnon system. The realization of both coherent coupling and dissipative coupling in a planar cavity may provide new avenues for the design and adaptation of dissipatively coupled systems for practical applications in information processing.