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Generation and investigation of ultrashort electrical currents

Using modern optical techniques, researchers from the Department of Physics of the Philipps-University of Marburg succeeded in generating and investigating electrical current pulses which are more than thousand times shortes as can be measured by the fastest available electronics. These ultrashort current pulses were generated by irradiation of metal surfaces with femtosecond laser pulses (1 femtosecond = 1 fs = 0.000 000 000 000 001 seconds) Due to their short duration these current pulses make it possible to study fundamental mechanisms of the interaction of electrons in solids. In particular, it was for the first time possible to observe the ultrafast temporal evolution of microscopical processes that are responsible for the electrical resistance of solids (SCIENCE, November 23, 2007).



Animation of the experiment

Press information in german


J. Güdde, M. Rohleder, T. Meier, S.W. Koch, U. Höfer,
Time-Resolved investigation of coherently controlled electric currents at a metal surface,
Science 318, 1287 (2007)


Prof. Dr. Ulrich Höfer
Fachbereich Physik und Zentrum für Materialwissenschaften
Philipps-Universität Marburg
Renthof 5
35032 Marburg

Tel.: +49 6421 28-24215

Last modified: 24.02.2015 · armbrusn

Fb. 13 - Physik

Surface Physics, Renthof 5, D-35032 Marburg
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