Fig. 4: Temporal evolution of the 2D spectrum of sample 1. | Communications Physics

Fig. 4: Temporal evolution of the 2D spectrum of sample 1.

From: Energy relaxation pathways between light-matter states revealed by coherent two-dimensional spectroscopy

Fig. 4

The temporal evolution of the absolute value 2D spectrum of 1 at φ = 5° reveals the coupling between P, J and P+, as well as the energy transfer into J and P, via the cross-peaks. Row a The data is linearly scaled and normalised to the half-maximum intensity of the P peak and; row b scaled by an arcsinh-function and normalised to the scaled maximum, in order to visualise the large dynamic range of the data. Contour lines are superimposed at values of 0.01, 0.04, 0.08, 0.12, 0.16, 0.2, 0.4, ..., 0.9 for clarity. Due to the high intensity of P, the spectra are distorted by an artefact from the Fourier transform of the discrete experimental data along τ → ωτ. This leads to peaks in the 2D spectrum that do not correspond to real transient signals of the system, mainly visible at ωt = 15,700 cm−1. Each frame shows the linear absorption spectrum as a black line for comparison.

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