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Science 16 August 2002:
Vol. 297. no. 5584, pp. 1131 - 1132
DOI: 10.1126/science.1075873
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Perspectives

PHYSICS:
Resolving Physical Processes on the Attosecond Time Scale

Maciej Lewenstein

Laser pulses of femtosecond duration allow many molecular and atomic processes to be investigated. Now physicists are reaching for the next frontier. In his Perspective, Lewenstein charts recent progress that has led to the generation of attosecond pulses. He highlights the report by Kienberger et al., who have used such pulses to "steer" an electron wave-packet like a classical particle.

The author is at the Institute for Theoretical Physics, Universität Hannover, 30167 Hannover, Germany. E-mail: lewen{at}itp.uni-hannover.de

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Science. ISSN 0036-8075 (print), 1095-9203 (online)