Note to users. If you're seeing this message, it means that your browser cannot find this page's style/presentation instructions -- or possibly that you are using a browser that does not support current Web standards. Find out more about why this message is appearing, and what you can do to make your experience of our site the best it can be.
Markus Drescher,12Michael Hentschel,1Reinhard Kienberger,1Gabriel Tempea,1Christian Spielmann,1Georg A. Reider,1Paul B. Corkum,3Ferenc Krausz1*
Single soft-x-ray pulses of ~90-electron volt (eV)
photon energy are produced by high-order harmonic generation with
7-femtosecond(fs), 770-nanometer (1.6 eV) laser pulses and are
characterizedby photoionizing krypton in the presence of the driver
laser pulse.By detecting photoelectrons ejected perpendicularly to the
laserpolarization, broadening of the photoelectron spectrum due toabsorption and emission of laser photons is suppressed, permittingthe
observation of a laser-induced downshift of the energy spectrumwith
sub-laser-cycle resolution in a cross correlation measurement.We
measure isolated x-ray pulses of 1.8 (+0.7/1.2) fs in duration,which
are shorter than the oscillation cycle of the driving laserlight (2.6 fs). Our techniques for generation and measurementoffer
sub-femtosecond resolution over a wide range of x-ray wavelengths,paving the way to experimental attosecond science. Tracing atomicprocesses evolving faster than the exciting light field is withinreach.
1 Institut für Photonik, Technische
Universität Wien, Gusshausstr. 27, A-1040 Wien, Austria.
2 Fakultät für Physik, Universität
Bielefeld, D-33615 Bielefeld, Germany.
3 National
Research Council of Canada, Ottawa, Ontario, Canada K1 A 0R6.
*
To whom correspondence should be addressed. E-mail:
ferenc.krausz{at}tuwien.ac.at
The editors suggest the following Related Resources on Science sites:
In Science Magazine
PERSPECTIVES
Derryck T. Reid (9 March 2001) Science291 (5510), 1911.
[DOI: 10.1126/science.1059499] |Summary »|Full Text »
THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Steering Attosecond Electron Wave Packets with Light.
R. Kienberger, M. Hentschel, M. Uiberacker, Ch. Spielmann, M. Kitzler, A. Scrinzi, M. Wieland, Th. Westerwalbesloh, U. Kleineberg, U. Heinzmann, et al. (2002)
Science
297, 1144-1148
|Abstract »|Full Text »|PDF »
Generation of Spatially Coherent Light at Extreme Ultraviolet Wavelengths.
R. A. Bartels, A. Paul, H. Green, H. C. Kapteyn, M. M. Murnane, S. Backus, I. P. Christov, Y. Liu, D. Attwood, and C. Jacobsen (2002)
Science
297, 376-378
|Abstract »|Full Text »|PDF »
Observation of a Train of Attosecond Pulses from High Harmonic Generation.
P. M. Paul, E. S. Toma, P. Breger, G. Mullot, F. Auge, Ph. Balcou, H. G. Muller, and P. Agostini (2001)
Science
292, 1689-1692
|Abstract »|Full Text »|PDF »
Feynman's Path-Integral Approach for Intense-Laser-Atom Interactions.
P. Salieres, B. Carre, L. Le Deroff, F. Grasbon, G. G. Paulus, H. Walther, R. Kopold, W. Becker, D. B. Milosevic, A. Sanpera, et al. (2001)
Science
292, 902-905
|Abstract »|Full Text »|PDF »
1.2) fs in duration, which
are shorter than the oscillation cycle of the driving laser light (2.6 fs). Our techniques for generation and measurement offer
sub-femtosecond resolution over a wide range of x-ray wavelengths, paving the way to experimental attosecond science. Tracing atomic processes evolving faster than the exciting light field is within reach.
