Fig. 2 | Nature Communications

Fig. 2

From: Determination of hot carrier energy distributions from inversion of ultrafast pump-probe reflectivity measurements

Fig. 2

Validation of the double inversion method. a A hypothetical change in the electron energy distribution, Δf(E). b The corresponding \(\Delta \epsilon \prime\prime\)(ħω) due to Δf(E). c The corresponding differential reflectivity, ΔR/R(ħω) inferred with the perturbed metallic dielectric function. In our procedure we take ΔR/R(ħω) and invert the relevant integral equations to obtain \(\Delta \epsilon \prime\prime\)(ħω), d, and Δf(E), e. The latter agrees well with the original form, a. Note that in the upper and lower panels the x axis is E(eV), where zero refers to the Fermi level, while in the three middle panels the x axis is ħω, where zero refers to the gap between the d-band and the conduction band of the L-point, which is roughly 2.45 eV

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