Electron exchange effect on surface magnetoplasmon polaritons dynamics in a graphene-plasmonic structure

Abstract

By employing a two-dimensional linearized magnetoquantum hydrodynamic model and Maxwell's equations, the electron exchange effect on the dispersion spectrum of surface magneto-plasmon polaritons (SMPPs) is studied in a perpendicular configurated graphene-plasmonic structure where a graphene sheet is directly covered by two semi-infinite dielectrics. Besides, other influences (including the graphene electron density, the dielectric constant of the dielectric medium, and the external magnetic field) on dispersion characteristics in both classical and quantum regimes of graphene surface magneto plasmon polaritons (GSMPPs) have been investigated in the presence of an electron exchange effect. Our results show that these influences greatly affect the dynamics of GSMPPs. Also, it is found that in the presence of the electron exchange effect, the propagation speed and the dispersion spectrum shift of GSMPPs in the classical regime are largely increased more than those in the case of the quantum regime. Our findings demonstrate that the electron exchange effect has a vital function in the modulation of the dynamical behavior of SMPPs in graphene-nano optical and plasmonic devices.