High resolution metrology of autoionizing states through Raman interferences

A. Plunkett, J. K. Wood, M. A. Alarcón, D. Biswas, C. H. Greene, A. Sandhu

Research output: Contribution to journalConference articlepeer-review


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.

Original languageEnglish (US)
Article number012003
JournalJournal of Physics: Conference Series
Issue number1
StatePublished - 2023
Event30th Annual International Laser Physics Workshop 2022, LPHYS 2022 - Virtual, Online
Duration: Jul 18 2022Jul 22 2022

ASJC Scopus subject areas

  • General Physics and Astronomy


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