Efficiencies of Aloof-Scattered Electron Beam Excitation of Metal and Graphene Plasmons

TL;DR

This paper evaluates how effectively aloof-scattered electron beams excite surface plasmons in metals and graphene, highlighting graphene's superior efficiency due to its unique properties and discussing potential applications in coherent radiation.

Contribution

It demonstrates that graphene exhibits high energy transfer efficiencies at low electron energies, attributed to its unique plasmon dispersion and structure, advancing plasmon excitation techniques.

Findings

Graphene shows higher energy transfer efficiency than metals.

Low electron energy suffices for effective plasmon excitation in graphene.

Potential applications in coherent radiation are identified.

Abstract

We assessed the efficiencies of surface plasmon excitation by an aloof-scattered electron beam on metals and graphene. Graphene is shown to exhibit high energy transfer efficiencies at very low electron kinetic energy requirements. We show that the exceptional performance of graphene is due to its unique plasmon dispersion, low electronic density and thin-film structure. The potential applications of these aloof-scattered graphene plasmons are discussed in aspects of coherent radiation.