Erlangen 2018 – scientific programme

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MO: Fachverband Molekülphysik

MO 15: Complex Systems in the Gas Phase

MO 15.1: Talk

Wednesday, March 7, 2018, 14:00–14:15, PA 1.150

Two-dimensional electronic spectroscopy in the gas phase — •Ulrich Bangert, Lukas Bruder, Daniel Uhl, Marcel Binz, Max Jakob, and Frank Stienkemeier — Physikalisches Institut, Universität Freiburg, Hermann-Herder-Str. 3, 79104 Freiburg

Two-dimensional electronic spectroscopy (2DES) is a powerful tool to study complex dynamics in real time. Due to a lack of sensitivity, 2D spectroscopy has been almost exclusively applied to the condensed phase. However, an extension to the gas phase would provide valuable complementary information about the influence of environmental parameters (e.g. solvent molecules) and increase the dimensionality of 2D measurements by employing mass- and energy-resolved photoion/-electron detection. To this end, we have built a 2DES setup based on quasi-continuous phase modulation combined with sensitive lock-in detection to facilitate 2DES of dilute molecular and cluster beams in the gas phase. We will present first results on dilute gas-phase systems combined with fluorescence and photoelectron detection, which confirm the high sensitivity of our setup and demonstrate the great potential in terms of resolution and versatility of this approach.