Investigation of Radiative and Evanescent Field Coupling in Dispersive Plasmonic Systems

Owing to its ability to change the fundamental properties and response of the systems  involved, coupling phenomenon has attracted wide interest. Central to the coupling phenomena are modes that coherently exchange power through certain mechanism . Coupling leads to certain universal properties, like avoided crossing in the Eigenvalue spectrum and hyperbolic dispersion, independent of the systems involved or of the coupling . Further, depending on the nature of the individual modes, the response of the system often shows interesting emergent phenomena such as extraordinary transmission, Fano line shapes, slow light, negative refractive 

index and Kondo effect. Plasmonic modes, being surface excitations, are an excellent choice to study the influence of coupling on these phenomena. In this talk, we present our studies on the influence of coupling on universal and emergent phenomena shown by two coupled dispersive plasmonic systems, namely Hybrid plasmonic waveguide and Metal-insulator-metal systems, with radiative and evanescent field coupling respectively.