Figure 4: Two-dimensional slices of 3DES spectra.
From: Direct observation of multistep energy transfer in LHCII with fifth-order 3D electronic spectroscopy

Slices of the 3D spectra of LHCII at λ1=655 nm and λ1=665 nm to obtain quasi-2D spectra, with selected quasi-2D spectra shown at population times t2=0.3 ps and t4=0.2, 0.8 and 5 ps (indicated on the plots). The colour scale represents amplitudes relative to the respective 3D spectrum’s global maximum.