Fig. 1: Single-shot space and time-resolved probe transmission measurement.
From: Optical probing of ultrafast laser-induced solid-to-overdense-plasma transitions
a The pump laser’s temporal intensity contrast. The color-shaded regions (1) and (2) are related to the modeling discussed in Fig. 2e. The feature at \({t}_{\rm{pump}} \sim -5\,\rm{ps}\) is an artifact from the measurement, cf. Materials and methods. b The experimental arrangement. The pump pulse is focused at normal incidence on the target, while the probe pulse is obliquely incident under an angle \(\alpha =37^{\circ}\). The inset shows the pump focus’s normalized spatial intensity profile. c 1D-spatially and temporally resolved relative transmission \({T}_{r}\) of the probe for a 10 nm-thick DLC foil measured using a 1D-spatially resolving (SR) imaging spectrometer and a chirped probe pulse. The wavelength on the top axis is converted into time on the bottom axis where \({t}_{{\rm probe}}=0\,{\rm ps}\) is arbitrarily chosen and corresponds to the arrival of the probe wavelength λ ≈ 920 nm. The inserted yellow curve is the normalized spatial intensity profile of the pump pulse in the transverse y-direction (cf. inset in b)
