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Phys Rev Lett. 2006 Jul 7;97(1):013001. Epub 2006 Jul 5.

Attosecond pulse trains generated using two color laser fields.

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  • 1Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803-4001, USA.


We investigate the spectral and temporal structure of high harmonic emission from argon exposed to an infrared laser field and its second harmonic. For a wide range of generating conditions, trains of attosecond pulses with only one pulse per infrared cycle are generated. The synchronization necessary for producing such trains ensures that they have a stable pulse-to-pulse carrier envelope phase, unlike trains generated from one color fields, which have two pulses per cycle and a pi phase shift between consecutive pulses. Our experiment extends the generation of phase stabilized few cycle pulses to the extreme ultraviolet regime.

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