Quantum plasmonic waveguides: Au nanowires

TL;DR

This paper presents a theoretical study of quantum plasmonic waveguides, focusing on ultra-thin gold nanowires where quantum size effects cause a blue-shift in surface plasmon resonance energy, advancing nanoscale optical communication technology.

Contribution

It introduces the concept of quantum plasmonic waveguides and evaluates quantum size effects on surface plasmon resonance in ultra-thin gold nanowires.

Findings

Blue-shift in surface plasmon resonance energy observed

Quantum size effects become significant at nanowire scales

Potential for nanoscale optical devices demonstrated

Abstract

Combining miniaturization and good operating speed is a compelling yet crucial task for our society. Plasmonic waveguides enable the possibility of carrying information at optical operating speed while maintaining the dimension of the device in the nanometer range. Here we present a theoretical study of plasmonic waveguides extending our investigation to structures so small that Quantum Size Effects (QSE) become non negligible, namely quantum plasmonic waveguides. Specifically, we demonstrate and evaluate a blue-shift in Surface Plasmon (SP) resonance energy for an ultra-thin gold nanowire.