Abstract
Variations of the spectra of plasmonic light emitted from the junction of a scanning tunneling microscope have been observed for different lateral positions of the scanning tunneling microscope tip on a Au(111) surface. Subnanometer spatial variations of the light emission intensity over a triangular island and in the vicinity of surface step edges have been recorded at different photon energies. They reveal surface standing wave patterns characteristic for two-dimensional confined electrons.
- Received 25 May 2008
DOI:https://doi.org/10.1103/PhysRevLett.101.136801
©2008 American Physical Society
Synopsis
Racking up the electron billiards
Published 6 October 2008
Spatial maps of the photon energy emitted by plasmons on a metal surface reveal standing wave patterns caused by electron confinement.
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