Two-Electron Photon Emission from Metallic Quantum Wells

28 January 2003

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 90 (4) , 046803
https://doi.org/10.1103/physrevlett.90.046803

Abstract

Unusual emission of visible light is observed in scanning tunneling microscopy of the quantum well system Na on Cu(111). Photons are emitted at energies exceeding the energy of the tunneling electrons. Model calculations of two-electron processes which lead to quantum well transitions reproduce the experimental fluorescence spectra, the quantum yield, and the power-law variation of the intensity with the excitation current.

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