Attosecond metrology

M. Hentschel, R. Kienberger, Ch. Spielmann, G. A. Reider, N. Milosevic, T. Brabec, P. Corkum, U. Heinzmann, M. Drescher and F. Krausz ()
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M. Hentschel: Institut für Photonik, Technische Universität Wien
R. Kienberger: Institut für Photonik, Technische Universität Wien
Ch. Spielmann: Institut für Photonik, Technische Universität Wien
G. A. Reider: Institut für Photonik, Technische Universität Wien
N. Milosevic: Institut für Photonik, Technische Universität Wien
T. Brabec: Institut für Photonik, Technische Universität Wien
P. Corkum: Steacie Institute of Molecular Sciences, NRC Canada
U. Heinzmann: Fakultät für Physik, Universität Bielefeld
M. Drescher: Fakultät für Physik, Universität Bielefeld
F. Krausz: Institut für Photonik, Technische Universität Wien

Nature, 2001, vol. 414, issue 6863, 509-513

Abstract: Abstract The generation of ultrashort pulses is a key to exploring the dynamic behaviour of matter on ever-shorter timescales. Recent developments have pushed the duration of laser pulses close to its natural limit—the wave cycle, which lasts somewhat longer than one femtosecond (1 fs = 10-15 s) in the visible spectral range. Time-resolved measurements with these pulses are able to trace dynamics of molecular structure, but fail to capture electronic processes occurring on an attosecond (1 as = 10-18 s) timescale. Here we trace electronic dynamics with a time resolution of ≤ 150 as by using a subfemtosecond soft-X-ray pulse and a few-cycle visible light pulse. Our measurement indicates an attosecond response of the atomic system, a soft-X-ray pulse duration of 650 ± 150 as and an attosecond synchronism of the soft-X-ray pulse with the light field. The demonstrated experimental tools and techniques open the door to attosecond spectroscopy of bound electrons.

Date: 2001
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DOI: 10.1038/35107000

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