Van-Hoang Le et al 2008 J. Phys. B: At. Mol. Opt. Phys. 41 085603 doi:10.1088/0953-4075/41/8/085603
Van-Hoang Le1, Ngoc-Ty Nguyen1, C Jin2, Anh-Thu Le2 and C D Lin2
Show affiliationsWe illustrate an iterative method for retrieving the internuclear separations of N2, O2 and CO2 molecules using the high-order harmonics generated from these molecules by intense infrared laser pulses. We show that accurate results can be retrieved with a small set of harmonics and with one or few alignment angles of the molecules. For linear molecules the internuclear separations can also be retrieved from harmonics generated using isotropically distributed molecules. By extracting the transition dipole moment from the high-order harmonic spectra, we further demonstrated that it is preferable to retrieve the interatomic separation iteratively by fitting the extracted dipole moment. Our results show that time-resolved chemical imaging of molecules using infrared laser pulses with femtosecond temporal resolutions is possible.
33.80.-b Photon interactions with molecules
42.65.Ky Frequency conversion; harmonic generation, including higher-order harmonic generation
Issue 8 (28 April 2008)
Received 8 February 2008, in final form 10 February 2008
Published 8 April 2008
Van-Hoang Le et al 2008 J. Phys. B: At. Mol. Opt. Phys. 41 085603
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