Surface plasmon(SP) is an electromagnetic excitation that propagates in a wave along the planar interface between a metal and a dielectric medium.Similarly,the localized magnetic resonance can be observed through exciting the magnetic polaritons(MPs) on the metal surfaces,which can greatly enhance the localized electromagnetic field.Furthermore,the MP can also be excited in dielectric interlayer metal gratings(metallic grating coated on a dielectric spacer atop an opaque metal film).The characte...