Fig. 3: 2DES dynamics revealing polariton Rabi oscillations.
From: Plasmon mediated coherent population oscillations in molecular aggregates
a Experimental 2DES map at \(T=0\) fs and \(\theta=27^\circ\). b Simulation of the 2DES map using the effective coupling Hamiltonian introduced in the main text. As in the experiment, diagonal and cross peaks with dispersive line shape involving the LP and X transitions appear, while the UP-related peaks are too weak. c The waiting time dynamics of the (LP,LP) diagonal and (LP,X) / (X,LP) cross peak reveal pronounced Rabi oscillations with a period matching the peak splitting while such oscillations are lacking at the (X,X) diagonal. The dynamics detected on the positive and negative sides of the dispersive peaks are displayed in the upper and lower panels, respectively. d Simulations of the waiting time dynamics for all peaks shown in (c). e Angle-resolved pump-probe dynamics detected at the positive peak of the dispersive LP resonance. f Rabi oscillations periods \(2\pi {{\hslash }}/\varDelta E\) (filled symbols) extracted from the 2DES waiting time dynamics for different incidence angles. UP-LP oscillations (red circle) are only resolved at \(\theta=21^\circ\), near the crossing angle. All other periods (blue squares) match the X-LP splitting. The 2DES peak splittings (green triangles) follow the energy differences \(\varDelta E\) between the corresponding UP, LP and X transitions, as deduced from the linear dispersion in Fig. 1e (open circles and lines).
