Surface-plasmon polaritons in multilayer jellium systems: dispersion and spatial description

TL;DR

This paper investigates the behavior and coupling of surface-plasmon polaritons in multilayer jellium systems, revealing quantum effects on resonance frequencies and detailed spatial mode descriptions, advancing understanding of complex nanostructures.

Contribution

It introduces a detailed analysis of SPP response functions in multilayer systems using the jellium model, highlighting quantum influences and mode coupling mechanisms.

Findings

Quantum effects shift resonance frequencies of SPPs.

Coupling mechanisms differ in multilayer configurations.

Spatial descriptions of SPP modes are provided.

Abstract

Surface-plasmon polaritons (SPPs) are electromagnetic waves that propagate along metal-dielectric interfaces, with important applications in sensing, energy, and nanotechnology. While the behavior of SPPs in single metal slabs is well understood, the coupling between plasmon modes in multilayer systems has received less attention. In this paper, we explore the response functions of SPPs in single-slab, double-slab, and two-different-slab systems using the jellium model. Thanks to a comparison with classical models, our study reveals how quantum effects influence the resonance frequencies of these modes. It also details the spatial description of the different SPP modes and unveils how their coupling occurs in two-different-slab systems. These findings provide new insights into the behavior of SPPs, especially in complex nanostructures.