%0 Journal Article %T Ionization phase-match gating for wavelength-tunable isolated attosecond pulse generation %+ Laboratoire d'optique appliquée (LOA) %+ Chemical Sciences Division [LBNL Berkeley] (CSD) %+ Department of Chemistry [Berkeley] %+ Department of Physics [Berkeley] %A Jullien, Aurélie %A Pfeifer, Thomas %A Abel, Mark J. %A Nagel, P.M. %A Bell, M.J. %A Neumark, Daniel M. %A Leone, Stephen R. %< avec comité de lecture %@ 0946-2171 %J Applied Physics B - Laser and Optics %I Springer Verlag %V 93 %N 2-3 %P 433-442 %8 2008-09-10 %D 2008 %R 10.1007/s00340-008-3187-z %Z PACS 42.65.Ky; 41.50.+h; 42.50.Hz; 42.65.Re %Z Physics [physics]/Physics [physics]/Optics [physics.optics]Journal articles %X High-order harmonic emission can be confined to the leading edge of an 800 nm driver laser pulse under moderately intense focusing conditions (7×10^14 W/cm^2) (Pfeifer et al. in Opt. Express 15:17120, 2007). Here, the experimentally observed curtailment of harmonic production on the leading edge of the driver pulse is shown to be controlled by an ionization-induced phase-matching condition. The transient plasma density inherent to the process of high-harmonic generation terminates the harmonic emission by an ultrafast loss of phase matching on the leading edge of the laser pulse. The analysis is supported by a reconstruction of the in situ intensity envelope of the driver pulse with attosecond temporal resolution, performed by measurements of the carrier-envelope phase dependence of individual half-cycle harmonic cutoffs. The method opens the way to wavelength-tunable isolated attosecond pulse generation. %G English %L hal-00528366 %U https://polytechnique.hal.science/hal-00528366 %~ X %~ ENSTA %~ CNRS %~ X-LOA %~ X-DEP %~ X-DEP-PHYS %~ PARISTECH %~ ENSTA_LOA %~ TEST3-HALCNRS