Fig. 4: Pump-pulse-dependent carrier energy shift.
From: Noncollinear harmonic spectroscopy reveals crossover of strong-field effects
a Integrated time-delayed central energy shift in the H3 spectra of the probe obtained through intensity-scaling measurements when both pump and probe pulses are polarized along the Γ-M direction, respectively. The estimated peak intensity of the pump ranges from 7.6 × 1011 to 4.8 × 1012 W/cm2, while the probe intensity is 2 × 1011 W/cm2. b, c Intensity-dependent numerical simulation and analytic solution when using similar parameters in the experimental setting. d Integrated time-delayed intensity modulations under different pump intensities. e Variation of the extracted energy modulation depth (peak-redshift to peak-blueshift) with the pump intensity, along with fits following the linear trend (solid black line). f Extracted modulation yields (spectral intensity) around zero delay under different pump intensities, with its linear fit shown as a solid black line. The error bars represent statistical uncertainties based on five measurements under identical experimental conditions.
