Fig. 2: Waiting time dynamics of selected peaks in the 2DES maps reveal 310 cm−1 peak amplitude oscillations that are assigned to intra-exciton Rabi oscillations.
From: Phonon-driven intra-exciton Rabi oscillations in CsPbBr3 halide perovskites
a–d 2DES maps at selected waiting times T between 210 fs and 315 fs. A zoom into the exciton region on a logarithmic scale (insets) shows the oscillation of the subpeak structure. e, f Waiting time dynamics of selected peaks near the exciton resonance display amplitude oscillations of the A2D signal with a period of 107 fs (310 cm−1), matching the spectral peak spacings (see also Fig. 1), but none of the phonon modes of these crystals. The insets show the Fourier transforms of selected dynamics.
