Metal-Insulator-Metal（MIM）plasma waveguide systems can manipulate light at the nanoscale domain and overcome the diffraction limit

which has attracted much attention recently.In this paper

a Finite Different Time Domain（FDTD）method is used to analyze the coupling resonant characteristics of a novel MIM waveguide system.The simulation results show that the resonant wavelength of the waveguide system is smaller with larger the resonant cavity height and coupling distance in the single cavity coupling.The resonant wavelength is larger with larger resonant cavity width.In the double-cavity coupling

the peak value of the electromagnetic induced transmission decreases with the increase of distance between the cavities

and the maximum transmittance of the structure is 0.62.The electromagnetic induction effect can change the group velocity of light.The maximum optical delay of the structure is 0.14 ps.The results show that the rectangular cavity MIM waveguide system controls the propagation of light in nanoscale domain

which provides a theoretical reference for the integration of plasma nanometer devices.