Influence of the electroneutrality of a metal layer on the plasmon spectrum in dielectric-metal-dielectric structures
In this paper, we propose a model that allows us to investigate the influence of quantum size effects and the electroneutrality condition on the spectrum of SPPs waves as a function of metal thickness in heterogeneous dielectric/metal/dielectric structures. It is shown that for ultrathin metal layers, the spectrum of plasmon waves has oscillatory behavior in the domain of small wave vectors (k~0.05-0.2 1/nm). The amplitude of oscillations depends on the conditions of electroneutrality for the dielectric/metal/dielectric structure.