Accumulation-layer Surface Plasmons

TL;DR

This paper introduces Accumulation-Layer Surface Plasmons (ASP), a new class of surface plasmons in charge accumulation layers within transparent conductive oxides, highlighting their tunability and potential applications.

Contribution

The study provides a rigorous analytical framework for ASP modes, revealing their properties and conditions for suppression in epsilon-near zero regions.

Findings

ASP are tightly bound near resonance

ASP exhibit significant effective index tunability

Suppression of ASP occurs in epsilon-near zero regions

Abstract

A rigorous analytical study of the eigenmodes supported by a charge accumulation layer within a transparent conductive oxide (TCO) is presented. The new class of surface plasmons termed Accumulation-Layer Surface Plasmon (ASP) is introduced. Near resonance ASP are tightly bound and display a vast effective index tunability that could be of great practical interest. The suppression of ASP in the presence of epsilon-near zero regions is discussed.