Erlangen 2018 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 16: Atomic Clusters I (joint session A/MO)

A 16.4: Vortrag

Montag, 5. März 2018, 17:15–17:30, K 2.016

Decoherence in the dissociation of the alkali-helium droplet system — •Marcel Binz, Lukas Bruder, Ulrich Bangert, Daniel Uhl, and Frank Stienkemeier — Institute of Physics, University of Freiburg, Germany

The intriguing properties of the alkali (Ak)-helium droplet system have been extensively studied in the past by several groups. The broadened Ak absorption lines were successfully explained by a pseudo-diatomic molecule model, and the dissociation of this pseudo molecular system was studied in detail with fs pump probe experiments. As an intriguing aspect of the dissociation, we have in a recent study investigated the temporal evolution of an electronic coherence induced in the parent system and follow this evolution in the desorbing Ak atom. For this purpose, we have applied coherent nonlinear spectroscopy to our helium droplet machine. Our scheme is particularly sensitive to the time evolution of coherences and allows us to follow the dissociation with high spectro-temporal resolution.