TY - JOUR A1 - Brixner, Tobias A1 - Koch, Federico A1 - Kullmann, Martin A1 - Selig, Ulrike A1 - Nuernberger, Patrick A1 - Götz, Daniel C. G. A1 - Bringmann, Gerhard T1 - Coherent two-dimensional electronic spectroscopy in the Soret band of a chiral porphyrin dimer JF - New Journal of Physics N2 - Using coherent two-dimensional (2D) electronic spectroscopy in fully noncollinear geometry, we observe the excitonic coupling of β,β'-linked bis[tetraphenylporphyrinato-zinc(II)] on an ultrafast timescale in the excited state. The results for two states in the Soret band originating from an excitonic splitting are explained by population transfer with approximately 100 fs from the energetically higher to the lower excitonic state. This interpretation is consistent with exemplary calculations of 2D spectra for a model four-level system with coupling. KW - optics KW - quantum optics KW - laser Y1 - 2013 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-96139 ER -