Scatter Plot from Scientific Research

Fluence dependence of the average value (indicated by *) of the reflectivity and real part of the optical conductivity (\({\sigma }_{1}(\omega )\)) in the 5–10 meV spectral range and light-induced ‘superfluid density’ (n sf ) extracted from a two-fluid model fit and expressed as a fraction of the total charge carrier density (n tot ). Red and blue symbols indicate measurements with excitation pulses tuned to 41 meV (10 THz) and 170 meV (41 THz) central frequency. The red dotted lines indicate the value of the corresponding quantity at equilibrium. These data were acquired at a base temperature T = 100 K, at a time-delay Δ t = 10 ps and with a pump-pulse duration of Δ τ pump ≈ 600 fs.

DOI