Welcome to the Kauffmann group! Our research is dedicated to ultrafast processes in the condensed phase. The systems we are interested in range from simple di-atomics to protein-bound light harvesting complexes. Using femtosecond laser pulses, we simultaneously excite valence electrons and nuclear motions in molecules or molecular aggregates. The interplay between these degrees of freedom is at the very heart of processes like energy- or charge-transfer. We use two-dimensional electronic spectroscopy (2D-ES) and related techniques to investigate these fascinating phenomena. In 2007 we were the first group to establish 2D-ES in Europe.

NEWS

10. May 2012
Harald F. Kauffmann has been nominated to give a talk at the Ultrafast Phenomena 2012 in Lausanne. The title of his talk is "Ultrafast Charge Transfer Visualized by Two-dimensional Electronic Spectroscopy".

07. May 2012
Dr. Niklas Christensson and Dr. Jürgen Hauer have been invited to give talks at this year's Conference on Coherent Multidimensional Spectroscopy (CMDS) in Berlin. The titles of their respective talks are "Vibronic Excitons and Long Lived Coherences in Photosynthetic Complexes" and "Long-lived coherence dynamics in 2D electronic spectra of a molecular aggregate". Additionally, Miss Margherita Maiuri, a project partner from the Politecnico di Milano, will be presenting a poster entitled "Coherences in 2D-electronic spectroscopy: Molecules and Aggregates".

15. March 2012
Harald F. Kauffmann was invited to give a talk at the Black Forest Focus on Soft Matter 7 in Saig/Titisee (Germany). The title of the talk was "Exciton/Charge-Transfer State Mixing Imaged by 2D-Coherent Electronic Spectroscopy"

01. March 2012
Dr. Jürgen Hauer was awarded funding to visit Prof. Giulio Cerullo's lab at the Dipartmento di Fisica at the Politecnico di Milano as part of the LaserLab Europe initiative.

RECENT PUBLICATIONS

System-Dependent Signatures of Electronic and Vibrational Coherences in Electronic 2D-Spectra
T. Mancal, N. Christensson, V. Lukes, , F. Milota, O. Bixner, H. F. Kauffmann, and J. Hauer
J. Phys. Chem. Lett., 3, 1497 (2012)

Ultrafast Photo-Induced Charge Transfer Unveiled by Two-Dimensional Electronic Spectroscopy
O. Bixner, V. Lukes, T. Mancal, J. Hauer, F. Milota, M. Fischer, I. Pugliesi, M. Bradler, W. Schmid, E. Riedle, H. F. Kauffmann, and N. Christensson
J. Chem. Phys. , 136, 204503 (2012)

Origin of Long Lived Coherences in Light-Harvesting Complexes
N. Christensson, H. F. Kauffmann, T. Pullerits, and T. Mancal
arXiv:1201.6325v1

Weak exciton scattering in molecular nanotubes revealed by double-quantum two-dimensional electronic spectroscopy
D. Abramavicius, A. Nemeth, F. Milota, J. Sperling, S. Mukamel, and H. F. Kauffmann
Physical Review Letters, 108, 067401 (2012)

Dynamics of quantum wave packets in complex molecules traced by 2D coherent electronic correlation spectroscopy
T. Mancal, O. Bixner, N. Christensson, J. Hauer, F. Milota, A. Nemeth, J. Sperling, and H. F. Kauffmann
22 ^nd Solvay Conference on Chemistry: Quantum Effects in Chemistry and Biology, Procedia Chemistry, 3, 105 (2011)