(a) Phase-matching of resonance-enhanced structures from Ar atom simulated by the TDDFT/OEP-SIC in a 730-nm laser field. The shift of the phase-matched RESs relative to the bound state energies is indicated in the inset. The laser peak intensity in the center of gas jet is I = 3.0×10¹³ W/cm², the confocal parameter of the laser beam is 35 mm, the length of gas jet is 2.0 mm, the pressure is 40 Torr, and the target is set at the laser focus –2 mm. (b) Same as (a) for the 60 Torr pressure.