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The light emission from a scanning tunneling microscope operated on a Ag(111) surface at 6 K is analyzed from low conductances to values approaching the conductance quantum. Optical spectra recorded at sample voltages V reveal emission with photon energies hv > 2eV. A model of electrons interacting coherently via a localized plasmon-polariton mode reproduces the experimental data, in particular, the kinks in the spectra at eV and 2eV as well as the scaling of the intensity at low and intermediate conductances.
|Journal||Physical Review Letters|
|Number of pages||5|
|Publication status||Published - 2017|
Bibliographical note© 2017 American Physical Society
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- 1 Finished
Præstrud, M. R. & Brodersen, S. W.
01/01/2014 → 31/12/2019