Figure 1
From: Phase-matched high-order harmonic generation in pre-ionized noble gases
(a) Results of numerical simulations of a 30 fs pulse propagating in krypton demonstrating the stabilization of the on-axis intensity for different medium pressures and input laser intensities with emphasis on region I in light red, where intensity drops rapidly and region II in light green, where intensity stabilizes. (b) Evolution of phase-mismatch \(\Delta k\) between the 800-nm laser and the 17th harmonic order calculated for the same pulse propagation as in panel (a). (c) Phase-mismatch for the same laser pulse as in (b), but with the medium homogeneously pre-ionized to 8%. The medium length is set to 15 mm.
