Acta Optica Sinica, Volume. 29, Issue 12, 3255(2009)
Cutoff Frequencies Analysis of Bichromatic High-Order Harmonic Generation Spectra
The high-order harmonic generation (HHG) power spectra from a one-dimensional model atom irradiated is numerically calculated by linearly polarized 8 fs bichromatic laser pulses composed of a fundamental Ti:sapphire and its second harmonic lasers. It is found that,the distinct double plateau structure appears when the relative phase is zero,and an isolated 110 as pulse can be obtained from the continuous harmonics at the end of the second plateau. This validates Yu Oishi′s experimental research conclusion that continuous harmonic spectra can be obtained at specific relative phase between the fundamental and its second harmonic lasers. The numerical results have been explained by a “three-step” model. Finally,the wavelet time-frequency analysis adopted verifies that the “three-step” model could exactly predict the cut-off frequencies of the bichromatic pulse HHG spectra.
Get Citation
Copy Citation Text
Chen Gao, Chen Jigen, Yang Yujun. Cutoff Frequencies Analysis of Bichromatic High-Order Harmonic Generation Spectra[J]. Acta Optica Sinica, 2009, 29(12): 3255
Category: Atomic and Molecular Physics
Received: Apr. 9, 2009
Accepted: --
Published Online: Dec. 23, 2009
The Author Email: Gao Chen (chengao@cust.edu.cn)