Abstract
We present the results of the theoretical study of the high-order harmonic generation (HHG) in atomic gases. It is shown that the photoemission spectra exhibit unusual behavior when the laser field strength approaches near-atomic values. In subatomic field strength the cut-off frequency increases linearly with laser pulse intensity. However, when the field strength approaches near-atomic region firstly cut-off frequency slows down and then saturates. To interpret such kind of photoemission spectrum behavior we have proposed the light-atom interaction theory based on the use of eigenfunctions of boundary value problem for “an atom in the external field” instead of the traditional basis of the “free atom” eigenfunctions.
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Acknowledgements
This work was supported by the Russian Foundation for Basic Research, grant nos. 12-02-00969 and 12-02-31843.
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Andreev, A.V., Stremoukhov, S.Y., Shoutova, O.A. (2014). Enhancement of Efficiency of XUV Generation in Atomic Gases Irradiated by Intense Laser Fields. In: Sebban, S., Gautier, J., Ros, D., Zeitoun, P. (eds) X-Ray Lasers 2012. Springer Proceedings in Physics, vol 147. Springer, Cham. https://doi.org/10.1007/978-3-319-00696-3_2
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DOI: https://doi.org/10.1007/978-3-319-00696-3_2
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-00695-6
Online ISBN: 978-3-319-00696-3
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