Abnormal anticrossing effect in photon-magnon coupling

The authors report an experimental demonstration of an opposite anticrossing effect in a photon-magnon coupled system consisting of a YIG and an inverted pattern of split-ring resonator (ISRR) structure in a planar geometry. The dispersion shape of the anticrossing effect is modifiable by changing the position/orientation of the ISRR split gap relative to the microstrip-line axis. This experimental observation, coupled with analytical calculations of various dispersion types of anticrossing, shows the potential and flexibility of photon-magnon systems for exploring emergent phenomena and light-matter interaction applications.