Generation and time-resolved detection of coherently controlled electric currents at surfaces

Jens Güdde, Marcus Rohleder, Torsten Meier, Stephan W. Koch, Ulrich Höfer

Research output: Contribution to journalConference article

2 Scopus citations

Abstract

We demonstrate a technique for the generation and detection of electron currents at surfaces on a femtosecond time scale with a contact-free experimental setup based on a combination of coherent control and photoemission spectroscopy. We have applied this technique for electrons excited into image-potential states on a Cu(100) surface that form a free-electron-like band in the direction parallel to the surface. The photogeneration of currents is described by optical Bloch equations for a multiband model. By incorporating field-induced interband and intersubband transitions together with intraband accelerations into the model, the observed phase dependence of the population and of the current can be reproduced.

Original languageEnglish (US)
Pages (from-to)461-465
Number of pages5
JournalPhysica Status Solidi (C) Current Topics in Solid State Physics
Volume6
Issue number2
DOIs
StatePublished - Dec 1 2009
Event9th International Workshop on Nonlinear Optics and Excitation Kinetics in Semiconductors, NOEKS 9 - Klink/Muritz, Germany
Duration: May 26 2008May 29 2008

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ASJC Scopus subject areas

  • Condensed Matter Physics

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