Fig. 3: Real-time observation of intralayer coherent vibrational dynamics of PdSe2.
From: Phonon-assisted electronic states modulation of few-layer PdSe2 at terahertz frequencies
a 3D transient absorption spectrum in terms of differential transmission ΔT/T as a function of time delay and probe photon energy on the femtosecond timescale. b The corresponding time-dependent dynamic process with different probe photon energies. c Coherent phonon dynamics at 4.3 THz probed at 1.71 eV. The oscillatory components of the transient absorption spectrum are extracted after subtracting the population dynamics. d Extracted oscillatory components of ΔE as a function of pump–probe time delay. The fitted lifetime is 1.73 ps.
