Confinement of lowenergy electrons near metallic surfaces for plasmon generation
Abstract
A method is described for studying the energy loss spectrum of aloof (nontouching) electrons with surfaces. Metallic foils perforated by microchannels restrict the maximum impact parameter to the channel radius (20 to 200 nm). The passage of electrons (20 eV to 2000 eV) near the cylinder walls results in prominent energyloss structure. In silver, a resonance loss peak at 3.5 to 3.6 eV is attributed to the formation of surface plasmons on the silver channels. The problem is modeled by a classical calculation of a charge moving parallel to a plane surface whose response is given by tabulated optical properties. The differential probability is calculated assuming the lower limit to the impact parameter is determined by surface roughness. The calculations are compared with the experimental data.
 Publication:

Presented at WarnerBrandt Workshop on Penetration Phenomena: In Elastic NearSurface Interaction
 Pub Date:
 1984
 Bibcode:
 1984ppen.work.....W
 Keywords:

 Confinement;
 Electron Trajectories;
 Energy Dissipation;
 Metal Foils;
 Plasmons;
 Spectrum Analysis;
 Electron Beams;
 Mathematical Models;
 Probability Theory;
 Resonance;
 Silver;
 Surface Roughness;
 Atomic and Molecular Physics