title: Vibronic and vibrational coherences in two-dimensional electronic spectra of supramolecular J-aggregates.
abstract: In J-aggregates of cyanine dyes, closely packed molecules form mesoscopic tubes with nanometer-diameter and micrometer-length. Their efficient energy transfer pathways make them suitable candidates for artificial light harvesting systems. This great potential calls for an in-depth spectroscopic analysis of the underlying energy deactivation network and coherence dynamics. We use two-dimensional electronic spectroscopy with sub-10 fs laser pulses in combination with two-dimensional decay-associated spectra analysis to describe the population flow within the aggregate. Based on the analysis of Fourier-transform amplitude maps, we distinguish between vibrational or vibronic coherence dynamics as the origin of pronounced oscillations in our two-dimensional electronic spectra.
authors: Photonics Institute, Vienna University of Technology, Gusshausstrasse 27, 1040 Vienna, Austria.
authors: Franz
authors: F
authors: Milota
authors: Valentyn I
authors: VI
authors: Prokhorenko
authors: Tomas
authors: T
authors: Mancal
authors: Hans
authors: H
authors: von Berlepsch
authors: Oliver
authors: O
authors: Bixner
authors: Harald F
authors: HF
authors: Kauffmann
authors: Jürgen
authors: J
authors: Hauer
mesh_terms: D002232:Carbocyanines / Q000737:chemistry; D004396:Coloring Agents / Q000737:chemistry; D004583:Electrons; D019277:Entropy; D005583:Fourier Analysis; D008958:Models, Molecular; D008968:Molecular Conformation; D011108:Polymers / Q000737:chemistry; D013057:Spectrum Analysis; D014732:Vibration; D014867:Water / Q000737:chemistry
chemical_list: D002232:Carbocyanines; D004396:Coloring Agents; D011108:Polymers; D014867:Water