Complete reconstruction of bound and unbound electronic wavefunctions in two-photon double ionization

P. A. Carpeggiani, E. V. Gryzlova, M. Reduzzi, A. Dubrouil, D. Faccialá, M. Negro, K. Ueda, S. M. Burkov, F. Frassetto, F. Stienkemeier, Y. Ovcharenko, M. Meyer, O. Plekan, P. Finetti, K. C. Prince, C. Callegari, A. N. Grum-Grzhimailo, G. Sansone

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


To be complete, the characterization of the photoionization process of atoms and molecules requires the extraction of all quantum-mechanical phases and amplitudes. So far, complete experiments have accessed only the ionization process of neutral atoms and molecules. Here we report the quantum-mechanically complete characterization of the single and double ionization of neon to yield doubly charged ions. The first ionization step by intense, polarized extreme ultraviolet light from a free-electron laser leaves the ion in a polarized state (that is, one in which the angular momentum of the ion is aligned in space). By controlling the polarization of the light, we determine the bound and continuum components of the system in the first and second ionization steps leading to the formation of doubly charged neon ions. We test the validity of our approach by characterizing the influence of autoionizing ionic states on the two-photon double-ionization mechanism. Our results are important for understanding the physics of the interaction of extreme ultraviolet radiation with ions.

Original languageEnglish
Pages (from-to)170-177
Number of pages8
JournalNature Physics
Issue number2
Publication statusPublished - 2019 Feb 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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