Electron trajectory control of odd and even order harmonics in high harmonic generation using an orthogonally polarised second harmonic field

C. Hutchison,, S. Houver, N. Lin, D.J. Hoffmann, F. McGrath, T. Siegel, D.R Austin, A. Zair, P. Salières, J.P. Marangos

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

We investigate quantum trajectory control in high-order harmonic generation using an additional orthogonally polarised second harmonic field. By controlling the relative phase between this field and the fundamental, we are able to suppress and enhance particular electron trajectories which results in a modulation of the harmonic emission. We observe a phase shift of the modulation between the short and long trajectories that is different for adjacent odd and even harmonics. These results show qualitative agreement with a full propagation calculation where the single atom response was obtained from the strong field approximation and the main results are explained by consideration of a single atom quantum orbit picture.
Original languageEnglish
Pages (from-to)608-614
JournalJOURNAL OF MODERN OPTICS
Volume61
Issue number7
Early online date25 Mar 2014
DOIs
Publication statusPublished - 2014

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