Freiburg 2024 – scientific programme

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MO: Fachverband Molekülphysik

MO 26: Cluster

MO 26.2: Talk

Friday, March 15, 2024, 14:45–15:00, HS 3042

Investigation of the homogeneous linewidth of organic molecules on solid rare-gas clusters — •Arne Morlok, Ulrich Bangert, Yilin Li, Felix Riedel, Leonie Werner, Lukas Bruder, and Frank Stienkemeier — University of Freiburg, Institute of Physics, Hermann-Herder-Str. 3, 79104 Freiburg, Germany

Doped rare-gas clusters are a well-established model system to study molecular systems. In order to harness the full potential of such cluster isolation techniques, it is crucial to understand the residual system-bath interaction between cluster and dopant. We employ two-dimensional electronic spectroscopy (2DES) to study the interaction of organic molecules with solid rare-gas clusters, which allows us to resolve the ensemble inhomogeneity and retrieve information about the molecule-cluster binding configurations [1]. Previously, this approach was applied to resolve the homogeneous linewidth of phthalocyanine molecules attached to neon clusters and ultimately provided a deeper understanding of the structural configurations in a nanoconfined system [2].

We extended this investigation in varying the cluster species and improving the data acquisition scheme, since the previous measurements were limited by long acquisition times. First results are presented, which suggest differences in the homogeneous linewidth and dynamics depending on the cluster species.

[1] L. Bruder et al., J. Phys. B: At. Mol. Opt. Phys. 52 183501 (2019).

[2] U. Bangert et al., Nat. Commun. 13 3350 (2022).

Keywords: 2D electronic spectroscopy; Phthalocyanine; rare-gas cluster; cluster isolation spectroscopy; organic molecules