High resolution metrology of autoionizing states through Raman interferences

Metrology of electron wavepackets is often conducted with the technique of photoelectron interferometry. However, the ultrashort light pulses employed in this method place a limit on the energy resolution. Here, weadvance ultrafast photoelectron interferometry access both high temporal and spectral...

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Bibliographic Details
Published in:Journal of physics. Conference series 2023-05, Vol.2494 (1), p.12003
Main Authors: Plunkett, A., Wood, J. K., Alarcón, M. A., Biswas, D., Greene, C. H., Sandhu, A.
Format: Article
Language:English
Subjects:
Argon
Electron wavepackets
Energy resolution
High resolution
Interferometry
Metrology
Perturbation theory
Photoelectrons
Physics
Spectral resolution
Wave packets
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Summary:Metrology of electron wavepackets is often conducted with the technique of photoelectron interferometry. However, the ultrashort light pulses employed in this method place a limit on the energy resolution. Here, weadvance ultrafast photoelectron interferometry access both high temporal and spectral resolution. The key to our approach lies in stimulating Raman interferences with a probe pulse and while monitoring the modification of the autoionizing electron yield in a separate delayed detection step. As a proof of the principle, we demonstrated this technique to obtain the components of an autoionizing nf′ wavepacket between the spin-orbit split ionization thresholds in argon. We extracted the amplitudes and phases from the interferogram and compared the experimental results with second-order perturbation theory calculations. This high resolution probing and metrology of electron dynamics opens the path for study of molecular wavepackets.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/2494/1/012003