  Coexistence of coupling-induced transparency (CIT) and absorption (CIA) of
signals in magnon-mediated photon-photon coupling was experimentally determined
in a planar hybrid structure consisting of a yttrium iron garnet (YIG) film and
three concentric inverted-split-ring resonators (ISRRs). The experimental
observation of simultaneous CIT and CIA phenomena was ascribed to
magnon-mediated photon-photon coupling between the individually decoupled
ISRRs. In order to capture the generic physics of the observed interactions, we
constructed an appropriate analytical model based on the balance between the
coherent and dissipative multiple-paths interactions, which model precisely
reproduced both the CIT and CIA experimentally observed from a single hybrid
system. This work, promisingly, can provide guidance for design of efficient,
flexible, and well-controllable photon-magnonic devices that are highly in
demand for applications to quantum technologies currently under development.
