electroneutrality

The model that describes the influence of Coulomb interaction between electrons (Coulomb correlations) on a frequency spectrum of plasmon-polariton waves in electroneutral structures dielectric/metal/dielectric is investigated.  It is shown that for atomically thin metal films (ATMF), such correlations affects both the quantum-dimensional behavior of the frequency spectrum as a function of the thickness of the metal film and
significantly improves the correlation of theoretical calculations and experiment.

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.