Selected Publications
- L. Bruder, U. Bangert, and F. Stienkemeier, Phase-modulated harmonic light spectroscopy, Opt. Express, 25 (5), 5302-5315 (2017).
- K. C. Prince et al., Coherent control with a short-wavelength free-electron laser, Nat. Photonics 10, 176-179 (2016).
- M. Mudrich, F. Stienkemeier, Photoionization of Pure and Doped Helium Nanodroplets, International Reviews in Physical Chemistry 33 (3), 301-339 (2014).
- F. Stienkemeier, and K. K. Lehmann, Spectroscopy and Dynamics in Helium Nanodroplets (Topical Review), J. Phys. B. 39, R127–R166 (2006).
- J. Higgins, C. Callegari, J. Reho, F. Stienkemeier, W. E. Ernst, K. K. Lehmann,
M. Gutowski, and G. Scoles, Photoinduced Chemical Dynamics of High-Spin Alkali
Trimers, Science 273, 629 (1996).
FRIAS Project
Coherent Spectroscopy of Elementary Steps for Light Harvesting
Fundamental quantum mechanical processes determine the properties of matter and their functionality. In order to understand complex processes such as light harvesting in photosynthesis and photovoltaics, a detailed knowledge of coherent effects in excitation and charge transfer processes and related dynamics is required. Advanced experimental methods, capable of detecting quantum coherences, so far are not applicable to quantum state controlled molecular complexes isolated from the perturbing environment, due to the low density of such targets. We will establish coherent femtosecond multidimensional spectroscopy to dilute isolated molecular complexes. For a specific heterogeneous synthesis we will use aggregation in superfluid helium at millikelvin temperatures. The goal is to identify processes and coherent dynamics of excitation and charge transfer in fundamental heterogeneous complexes, elucidate coherence and dissipation effects in contact with tailored external baths, and characterize collective excitation as well as autoionization in dilute atomic gases.