Abstract
Isolated attosecond generation under the two-color scheme and three-color scheme are investigated theoretically by use of wave-packet dynamics calculation. Optimized relative phase under the two-color field is obtained and comparison is taken between the second-harmonic control and half-harmonic control. A further exploration of the three-color scheme by adding a weak second-harmonic pulse and a half-harmonic pulse onto 8×1014 W cm−2 6 fs/800 nm pulse shows the potential for generating the 337 eV continuum supporting creation of an isolated 11 as pulse.
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