Erlangen 2022 – scientific programme

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A: Fachverband Atomphysik

A 14: Interaction with VUV and X-ray light

A 14.3: Talk

Wednesday, March 16, 2022, 11:15–11:30, A-H1

Towards Two-Dimensional Spectroscopy in X-Ray Quantum Optics — •Lukas Wolff and Jörg Evers — Max-Planck-Institut für Kernphysik, Heidelberg, Germany

Advanced spectroscopic techniques based on the precise control of timing and phase properties of light pulses are well-established throughout the long-wavelength part of the electromagnetic spectrum. In the recent past, considerable progress has also been achieved in the x-ray and XUV-regime. In the hard x-ray regime where the implementation of such control schemes is still challenging, Mößbauer nuclei featuring exceptionally narrow resonances can be employed to split light from modern high-brilliance coherent x-ray sources into double-pulses with characteristic spectral features. High-precision control of the relative phase between these double-pulses was demonstrated recently using fast mechanical motion of nuclear targets.

Here, we propose a new technique for the analysis of 2D spectra obtained via time- and frequency-resolved measurements in the hard x-ray regime using a tunable Mößbauer reference absorber and exploiting mechanical phase control. To demonstrate advantages and limitations of the approach, we extract spectral properties of ensembles of Mössbauer nuclei from simulated data. Our findings may help to pave the way towards studies of more complex spectral structures or nonequilibrium phenomena in Mößbauer science.