316 citations · 1k across the 14 of their papers we have counts for
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Electromagnetic Green's function for layered systems: Applications to nanohole interactions in thin metal films
Peter Johansson
We derive expressions for the electromagnetic Green's function for a layered system using a transfer matrix technique. The expressions we arrive at makes it possible to study symme…
Light emission from Na/Cu(111) induced by a scanning tunneling microscope
Peter Johansson, Germar Hoffmann, Richard Berndt
Measurements of light emission from a scanning tunneling microscope probing a Na overlayer on the (111) surface of Cu are reported along with results of a model calculation that es…
Two-Electron Photon Emission From Metallic Quantum Wells
Germar Hoffmann, Richard Berndt, Peter Johansson
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…
Butterfly-like spectra and collective modes of antidot superlattices in magnetic fields
Egidijus Anisimovas, Peter Johansson
We calculate the energy band structure for electrons in an external periodic potential combined with a perpendicular magnetic field. Electron-electron interactions are included wit…