Premium
Light emission from surfaces, thin films and particles induced by high‐energy electron beam
Author(s) -
Yamamoto N.,
Araya K.,
Toda A.,
Sugiyama H.
Publication year - 2001
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.958
Subject(s) - multipole expansion , surface plasmon , electron , light emission , materials science , atomic physics , optics , molecular physics , radiative transfer , cathode ray , thin film , plasmon , chemistry , physics , nanotechnology , quantum mechanics
Light emission generated by a high‐energy electron passing through surfaces, thin films and particles of several materials were studied using a light detection system combined with a transmission electron microscope with an accelerating voltage of 200 kV. A silver film with a rough surface gives rise to inhomogeneous intensity distribution in the photon maps, which is due to the coupling of light with the non‐radiative surface plasmon mode through the surface roughness. In the case of a rough surface of a silver film with a granular structure, light is strongly emitted from a localized region with high polarization. The emissions from silver particles with various diameters were observed. The emission spectra show multiple peaks corresponding to the multipole modes of the electromagnetic oscillation in the spherical particle. The results can be explained well by the theory involving the retardation effect. Copyright © 2001 John Wiley & Sons, Ltd.