Observation of a Train of Attosecond Pulses from High Harmonic Generation

✍ Scribed by Paul, P. M.

• Book ID: 118245037
• Publisher: American Association for the Advancement of Science
• Year: 2001
• Tongue: English
• Weight: 338 KB
• Volume: 292
• Category: Article
• ISSN: 0036-8075
• DOI: 10.1126/science.1059413

✦ Synopsis

In principle, the temporal beating of superposed high harmonics obtained by focusing a femtosecond laser pulse in a gas jet can produce a train of very short intensity spikes, depending on the relative phases of the harmonics. We present a method to measure such phases through two-photon, two-color photoionization. We found that the harmonics are locked in phase and form a train of 250-attosecond pulses in the time domain. Harmonic generation may be a promising source for attosecond time-resolved measurements.