Open AccessRadial index of Laguerre-Gaussian modes in high-order-harmonic generation
Author(s) -
Romain Géneaux,
Céline Chappuis,
T. Auguste,
Samuel Beaulieu,
Timothy T. Gorman,
F. Lepetit,
Louis F. DiMauro,
Thierry Ruchon
Publication year - 2017
Publication title -
physical review. a/physical review, a
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.391
H-Index - 283
eISSN - 2469-9934
pISSN - 2469-9926
DOI - 10.1103/physreva.95.051801
Subject(s) - extreme ultraviolet , physics , high harmonic generation , dipole , optics , attosecond , harmonic , atomic physics , ultrashort pulse , quantum mechanics , laser
International audienceHigh-order-harmonic generation (HHG) is a tabletop and tunable source of extreme ultraviolet (XUV) light. Its flexibility was lately evidenced by the production of Laguerre-Gaussian (LG) modes in the XUV with a known azimuthal index. Here we investigate the role of the radial index of LG modes in HHG. We show both numerically and experimentally that the mode content of the emitted XUV radiation can be tuned by controlling the weight of the different quantum trajectories involved in the process. The appearance of high-order radial modes is finally linked to the atomic dipole phase of HHG. These results extend the capabilities of shaping the spatial mode of ultrashort XUV pulses of light
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