Extended Data Fig. 2: Pump-fluence-dependent hybridization gap and observation of Floquet sidebands.
From: Pseudospin-selective Floquet band engineering in black phosphorus
a–f, TrARPES dispersions along the AC direction with different pump fluences (s-pol. pump, ħω = 420 meV, Δt = 0). The red and blue arrows point to the Floquet sideband of the VB and hybridization gap. g, The differential TrARPES dispersion with a pump fluence of 2.7 mJ cm−2 after subtracting the dispersion before pump. h–m, EDCs for data shown in a–f at the momentum point of the hybridization gap (dashed line in f) and fitting curves. n, The extracted hybridization gap as a function of pump fluence. The error bar of the hybridization gap is defined as the upper limit when the energy position is clearly offset from the peak in h–m and the error bar of the pump fluence is defined by the fluctuation of pump power (10%).
