Ultrafast coherent control of electric currents at metal surfaces

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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We report the development of an experimental technique to measure the dynamics of electrical currents on the femtosecond timescale. The technique combines methods of coherent control with time- and angle-resolved photoelectron spectroscopy. Direct snapshots of the momentum distribution of the excited electrons as function of time are then determined by photoelectron spectroscopy. In this way we gain information on the generation and decay of ultrashort current pulses in unprecedented detail. In particular, this technique allows the observation of elastic electron scattering in terms of an incoherent population dynamics in momentum space. We have applied this optical current generation and detection scheme to electrons in so-called image-potential states which represent a prototype of two-dimensional electronic surface states. Electrons in these states are bound perpendicular to the metal surface by the Coulombic image potential whereas they can move almost freely parallel to the surface. For the (n=1) image-potential state of Cu(100) we find a decay time of 10 fs due to electron scattering with steps and surface defects.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume7600
DOIs
StatePublished - 2010
Externally publishedYes
EventUltrafast Phenomena in Semiconductors and Nanostructure Materials XIV - San Francisco, CA, United States
Duration: Jan 24 2010Jan 27 2010

Other

OtherUltrafast Phenomena in Semiconductors and Nanostructure Materials XIV
CountryUnited States
CitySan Francisco, CA
Period1/24/101/27/10

Fingerprint

Coherent Control
Electric Current
Electric currents
electric current
metal surfaces
Electron scattering
Metals
Electron
Photoelectron spectroscopy
Electrons
Momentum
electron scattering
photoelectron spectroscopy
momentum
Population dynamics
electrons
Elastic scattering
Surface defects
Surface states
decay

Keywords

  • Coherent control
  • Image-potential states
  • Metal surfaces
  • Time-resolved photoelectron spectroscopy
  • Ultrafast electric currents

ASJC Scopus subject areas

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Güdde, J., Rohleder, M., Meier, T., Koch, S. W., & Höfer, U. (2010). Ultrafast coherent control of electric currents at metal surfaces. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 7600). [76001K] https://doi.org/10.1117/12.839672

Ultrafast coherent control of electric currents at metal surfaces. / Güdde, Jens; Rohleder, Marcus; Meier, Torsten; Koch, Stephan W; Höfer, Ulrich.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 7600 2010. 76001K.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Güdde, J, Rohleder, M, Meier, T, Koch, SW & Höfer, U 2010, Ultrafast coherent control of electric currents at metal surfaces. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 7600, 76001K, Ultrafast Phenomena in Semiconductors and Nanostructure Materials XIV, San Francisco, CA, United States, 1/24/10. https://doi.org/10.1117/12.839672
Güdde J, Rohleder M, Meier T, Koch SW, Höfer U. Ultrafast coherent control of electric currents at metal surfaces. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 7600. 2010. 76001K https://doi.org/10.1117/12.839672
Güdde, Jens ; Rohleder, Marcus ; Meier, Torsten ; Koch, Stephan W ; Höfer, Ulrich. / Ultrafast coherent control of electric currents at metal surfaces. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 7600 2010.
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