Creation of a magnetic plasmon polariton through strong coupling between an artificial magnetic atom and the defect state in a defective multilayer microcavity

We studied the propagation of an electromagnetic (EM) wave in a defective multilayer microcavity with an artificial magnetic atom located at the edge of the defect layer. When the frequency of the defect state is tuned to the resonance frequency of the magnetic atom, strong coupling happens between this atom and EM waves. It creates a type of magnetic plasmon polariton (MPP) with Rabi-type splitting effect that results in the two branches of the MPP mode. The linewidth of the MPP and Rabi-type oscillation of magnetic field inside the atom are investigated in the simulations. A great enhancement of local fields can also be obtained from the MPP, which has a good application in nonlinear optics.