Fig. 2: Experimental maps of the excited state depending on the probe and pump delay.
From: Femtosecond control of phonon dynamics near a magnetic order critical point

a Map of the PLD amplitude before and after excitation by two pulses with fluences P1 = P2 = 1.5 mJ/cm2. b Map of the PLD amplitude before and after excitation by two pulses with fluences P1 = 1.5 mJ/cm2, P2 = 0.7 mJ/cm2. c Magnitude of the PLD in “enhancement” and “suppression” conditions with laser fluences P1 = 9.5 mJ/cm2 and P2 = 4.8 mJ/cm2. Solid lines connect experimental data points . Vertical bars show uncertainties, estimated as a standard deviation \({\sigma }_{{{\mathrm{FEL}}}}\) of the PLD amplitude at t < 0 and as \({\sigma }_{{{\mathrm{full}}}}=\sqrt{{\sigma }_{{{\mathrm{FEL}}}}^{2}+{\sigma }_{{{\mathrm{ex}}}}^{2}}\) at t > 0, where \({\sigma }_{{{\mathrm{ex}}}}\) is a standard deviation of the minimum reached PLD amplitude after the first excitation between different scans with identical fluence \(P\). The dashed red lines mark the times of second pulse arrival. Data for \({\tau }_{2}-{\tau }_{1}\) 1295 fs (orange line), \({\tau }_{2}-{\tau }_{1}\)106 fs (purple line) are shown.