@conference{Carrera07, author={Juan J. Carrera and Sang-Kil Son and Shih-I Chu}, title={\textit{Ab initio} theoretical investigation of the frequency comb structure in the {XUV} regime via high harmonic generation}, year={2007}, month={June 5-9}, booktitle={The 38th Meeting of the Division of Atomic, Molecular and Optical Physics}, organization={American Physics Society}, address={Calgary, Alberta, Canada}, keywords={TDSE; H atom; comb laser; strong-field; HHG; KU;}, url={http://meetings.aps.org/link/BAPS.2007.DAMOP.D1.61}, abstract={We present an \textit{ab initio} quantum investigation of the frequency comb structure formed within each high harmonic generation (HHG) power spectrum driven by a train of equal- spacing short laser pulses. The HHG power spectrum of atomic hydrogen is calculated by solving the time-dependent Schr{\"o}dinger equation accurately and efficiently by means of the time-dependent generalized pseudospectral method. We found that the frequency comb structure is preserved within each harmonic. In addition, the repetition frequency of the comb laser depends upon the pulse separation $\tau$ and the spectral width of each individual comb fringe is inversely proportional to the number of pulses ($n$) used. However, the global HHG power spectrum pattern depends only upon the laser frequency and intensity used and is not sensitive to the $\tau$ and $n$ parameters. Finally, the frequency comb structure persists even in the presence of appreciable ionization.
[ Bulletin of the American Physical Society, Vol. 52, No. 7, p. 44 ]}
}