Fig. 3: Spectral dependence of induced transmission and continuum structure with the Fano profile.
a The small-signal absorbance spectrum. The main transitions are labelled according to the excited states (all originating from the 1s(A1) ground state). The laser spectrum corresponding to the off-resonance photon energy used in Fig. 2c is shown as a blue line. b Wavelength dependence of the pump-probe signal, ΔT/T, with fixed pump power (same as in Fig. 2c) and fixed time delay of t = 15ps between pump and probe as a function of photon energy, ħω. The solid curve is the result of a fit to the data using Eq. (1) as described in the Methods. c The recombination rate (blue symbols), 1/tR, and bleaching (orange symbols), B, found from fitting the data in Fig. 2c. The solid curves are the results of a global fit using Eq. (1) for the ionization (blue line) and a Lorentzian for the bleaching (orange line). The top axis shows the detuning Δ in units of the width from the fit, Γ.
