Komtur-Preis 2024

Betreuer: Prof. Dr. Frank Stienkemeier

Coherent multidimensional spectroscopy (CMDS) is a powerful ultrafast spectroscopic technique to study dynamics of matter with a high spectro-temporal resolution otherwise only accessible in disjunct experiments. Extending the method to weakly perturbed molecular and cluster species in the gas phase permits very high spectral resolution [1]. Previous experiments have revealed valuable insights such as the homogeneous line profile of chromophores solvated in nanoclusters [2]. However, in this case, the attainable resolution is limited by the acquisition time. To solve this problem, a rapid scanning method, developed by the Oglivie group in 2021 [3], is implemented and extended in this thesis to inter-pulse delays in the nanosecond range. This reduces the acquisition time by up to two orders of magnitude. In addition, optical delay tracking allows the correction of non-constant delay stage speeds and movements in the interferometer, which further improves the spectral resolution of phase-modulated wave packet interferometry experiments.

[1] L. Bruder et al., Nat. Commun. 9 4823 (2018).

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

[3] D. Agathangelou et al., J. Chem. Phys. 155 094201 (2021).