Rostock 2019 – scientific programme

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MO: Fachverband Molekülphysik

MO 18: Posters 2: Time Resolved Spectroscopy

MO 18.15: Poster

Wednesday, March 13, 2019, 16:15–18:15, S Foyer LLM

Multidimensional electronic spectroscopy of a molecular beam with mass-resolved ion detection — •Hans-Peter Solowan, Tristan Ford, Sebastian Roeding, and Tobias Brixner — Physikalische und Theoretische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg

We report on the progress with a new technique, molecular-beam coherent two-dimensional (2D) electronic spectroscopy, enabling multidimensional electronic spectroscopy of gas-phase samples with mass-resolved ion detection. Using time-of-flight mass spectrometry, we have introduced cations as a new observable in coherent 2D spectroscopy [1].

Using a pulse shaper based on an acousto-optic programmable dispersive filter and rapid scanning [2] we focus a train of four collinear pulses in the visible regime into an interaction region with a molecular beam. Via phase cycling [3] the signals of the time-of-flight mass spectrometer can be disentangled to extract the different contributions, like the photon-echo response. We have recently installed a preparation chamber for a supersonic molecular beam with argon as a seed gas. This allows us to investigate not only gaseous samples but also liquid and solid ones that are evaporated by an oven.

[1] S. Roeding and T. Brixner, Nat. Commun. 9, 2519 (2018)

[2] S. Draeger, S. Roeding, and T. Brixner, Opt. Express 25, 3259 (2017)

[3] H.-S. Tan, J. Chem. Phys. 129, 124501 (2008).