University of Freiburg
Institute of Physics
Experimental Atomic and Molecular Physics
Coherent multidimensional specroscopy of ultrafast molecular processes
Two-dimensional coherent electronic spectroscopy (2DES) is a powerful method to study the ultrafast dynamics of matter . This includes processes like singlet fission as well as charge and energy transfer, which play a crucial role in many technical applications such as solar cells . Singlet fission in particular, has gained increasing attention during the last two decades as a way to improve solar cell efficiency with organic molecules beyond the Shockley-Queisser limit [3,4].
In our group, we isolate the functional molecular units in cold nobel gas clusters in the gas phase and apply 2DES to study the ultrafast dynamics . This allows us to study the molecular processes of interest in an almost completely unperturbed environment. To obtain a wide view on the investigated systems we employ different detection methods, ranging from fluorescence, electron energy and photoion mass detection .
 L. Bruder, U. Bangert, M. Binz, D. Uhl, and F. Stienkemeier, J. Phys. B: At. Mol. Opt. Phys. 52, 183501 (2019)
 V. Coropceanu, X. Chen, T. Wang, Z. Zheng, J. Brédas, Nat. Rev. Mater. 4, 689 (2019)
 W. Shockley and H. Queisser, Int. J. Appl. Phys. 32, 510 (1961)
 M. Einzinger et al., Nature 571, 90 (2019)
 L. Bruder et al., Nat Commun 9, 4823 (2018).
 L. Bruder et al., J. Phys. B: At. Mol. Opt. Phys. 52, 183501 (2019)
Supervisor: Frank Stienkemeier