@unpublished{MuellerDraegerMaetal.2018,
  author    = {M{\"u}ller, Stefan and Draeger, Simon and Ma, Kiaonan and Hensen, Matthias and Kenneweg, Tristan and Pfeiffer, Walter and Brixner, Tobias},
  title     = {Fluorescence-Detected Two-Quantum and One-Quantum-Two-Quantum 2D Electronic Spectroscopy},
  series = {Journal of Physical Chemistry Letters},
  journal   = {Journal of Physical Chemistry Letters},
  doi       = {10.1021/acs.jpclett.8b00541},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-173468},
  year      = {2018},
  abstract  = {We demonstrate two-quantum (2Q) coherent two-dimensional (2D)electronic spectroscopy using a shot-to-shot-modulated pulse shaper and fluorescence detection. Broadband collinear excitation is realized with the supercontinuum output of an argon-filled hollow-core fiber, enabling us to excite multiple transitions simultaneously in the visible range. The 2Q contribution is extracted via a three-pulse sequence with 16-fold phase cycling and simulated employing cresyl violet as a model system. Furthermore, we report the first experimental realization of one-quantum-two-quantum (1Q-2Q) 2D spectroscopy, offering less congested spectra as compared with the 2Q implementation. We avoid scattering artifacts and nonresonant solvent contributions by using fluorescence as the observable. This allows us to extract quantitative information about doubly excited states that agree with literature expectations. The high sensitivity and background-free nature of fluorescence detection allow for a general applicability of this method to many other systems.},
  subject      = {Fluoreszenz},
  language  = {en}
}
@article{RoedingBrixner2018,
  author    = {Roeding, Sebastian and Brixner, Tobias},
  title     = {Coherent two-dimensional electronic mass spectrometry},
  series = {Nature Communications},
  volume    = {9},
  journal   = {Nature Communications},
  number    = {2519},
  doi       = {10.1038/s41467-018-04927-w},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-226458},
  pages     = {1-9},
  year      = {2018},
  abstract  = {Coherent two-dimensional (2D) optical spectroscopy has revolutionized our ability to probe many types of couplings and ultrafast dynamics in complex quantum systems. The dynamics and function of any quantum system strongly depend on couplings to the environment. Thus, studying coherent interactions for different environments remains a topic of tremendous interest. Here we introduce coherent 2D electronic mass spectrometry that allows 2D measurements on effusive molecular beams and thus on quantum systems with minimum system-bath interaction and employ this to identify the major ionization pathway of 3d Rydberg states in NO2. Furthermore, we present 2D spectra of multiphoton ionization, disclosing distinct differences in the nonlinear response functions leading to the ionization products. We also realize the equivalent of spectrally resolved transient-absorption measurements without the necessity for acquiring weak absorption changes. Using time-of-flight detection introduces cations as an observable, enabling the 2D spectroscopic study on isolated systems of photophysical and photochemical reactions.},
  language  = {en}
}