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Science 20 October 2006:
Vol. 314. no. 5798, p. 381
DOI: 10.1126/science.314.5798.381d
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The availability of single-cycle isolated attosecond pulses provides the possibility of probing ultrafast electron dynamics in atoms and molecules where the strong-field processes are driven by the electric field of the attosecond pulses, rather than by the brute-force response to their high intensity. Sansone et al. (p. 443) have now generated isolated, single-cycle 130-attosecond pulses with energies in the extreme ultraviolet (~ 36 electron volts). Phase-stabilized, 5-femtosecond infrared driving pulses with modulated-polarization state were fired into an argon-filled gas cell to generate these higher harmonics.




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