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Title: Symmetry breakdown of electron emission in extreme ultraviolet photoionization of argon

Abstract

Short wavelength free-electron lasers (FELs), providing pulses of ultrahigh photon intensity, have revolutionized spectroscopy on ionic targets. Their exceptional photon flux enables multiple photon absorptions within a single femtosecond pulse, which in turn allows for deep insights into the photoionization process itself as well as into evolving ionic states of a target. Here we employ ultraintense pulses from the FEL FERMI to spectroscopically investigate the sequential emission of electrons from gaseous, atomic argon in the neutral as well as the ionic ground state. A pronounced forward-backward symmetry breaking of the angularly resolved emission patterns with respect to the light propagation direction is experimentally observed and theoretically explained for the region of the Cooper minimum, where the asymmetry of electron emission is strongly enhanced. Furthermore, these findings aim to originate a better understanding of the fundamentals of photon momentum transfer in ionic matter.

Authors:
 [1];  [2];  [3];  [4]; ORCiD logo [5];  [6];  [7];  [8]; ORCiD logo [5];  [9]; ORCiD logo [5];  [5];  [4];  [5];  [10]; ORCiD logo [5];  [7]; ORCiD logo [11];  [12];  [5] more »;  [5];  [4];  [5];  [5]; ORCiD logo [7];  [7];  [7];  [13];  [14]; ORCiD logo [15];  [7];  [16];  [4] « less
  1. European XFEL GmbH, Schenefeld (Germany); Univ. of Kassel, Kassel (Germany)
  2. Univ. of Kassel, Kassel (Germany); Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
  3. Lomonosov Moscow State Univ., Moscow (Russia)
  4. European XFEL GmbH, Schenefeld (Germany)
  5. Elettra-Sincrotrone Trieste SCpA, Trieste (Italy)
  6. X-Spectrum GmbH, Hamburg (Germany)
  7. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
  8. European XFEL GmbH, Schenefeld (Germany); Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
  9. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  10. Ecole Polytechnique Federal de Lausanne, Lausanne (Switzerland)
  11. Univ. of Kassel, Kassel (Germany)
  12. Qamcom Research & Technology AB, Gothenburg (Sweden)
  13. Paul Scherrer Inst. (PSI), Villigen (Switzerland)
  14. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany); SLAC National Accelerator Lab., Menlo Park, CA (United States)
  15. Elettra-Sincrotrone Trieste SCpA, Trieste (Italy); CNR, IOM, Trieste (Italy)
  16. European XFEL GmbH, Schenefeld (Germany); Lomonosov Moscow State Univ., Moscow (Russia)
Publication Date:
Research Org.:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1490647
Grant/Contract Number:  
AC02-76SF00515
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 9; Journal Issue: 1; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS

Citation Formats

Ilchen, Markus, Hartmann, G., Gryzlova, E. V., Achner, A., Allaria, E., Beckmann, A., Braune, M., Buck, J., Callegari, C., Coffee, R. N., Cucini, R., Danailov, M., De Fanis, A., Demidovich, A., Ferrari, E., Finetti, P., Glaser, L., Knie, A., Lindahl, A. O., Plekan, O., Mahne, N., Mazza, T., Raimondi, L., Roussel, E., Scholz, F., Seltmann, J., Shevchuk, I., Svetina, C., Walter, P., Zangrando, M., Viefhaus, J., Grum-Grzhimailo, A. N., and Meyer, M. Symmetry breakdown of electron emission in extreme ultraviolet photoionization of argon. United States: N. p., 2018. Web. doi:10.1038/s41467-018-07152-7.
Ilchen, Markus, Hartmann, G., Gryzlova, E. V., Achner, A., Allaria, E., Beckmann, A., Braune, M., Buck, J., Callegari, C., Coffee, R. N., Cucini, R., Danailov, M., De Fanis, A., Demidovich, A., Ferrari, E., Finetti, P., Glaser, L., Knie, A., Lindahl, A. O., Plekan, O., Mahne, N., Mazza, T., Raimondi, L., Roussel, E., Scholz, F., Seltmann, J., Shevchuk, I., Svetina, C., Walter, P., Zangrando, M., Viefhaus, J., Grum-Grzhimailo, A. N., & Meyer, M. Symmetry breakdown of electron emission in extreme ultraviolet photoionization of argon. United States. https://doi.org/10.1038/s41467-018-07152-7
Ilchen, Markus, Hartmann, G., Gryzlova, E. V., Achner, A., Allaria, E., Beckmann, A., Braune, M., Buck, J., Callegari, C., Coffee, R. N., Cucini, R., Danailov, M., De Fanis, A., Demidovich, A., Ferrari, E., Finetti, P., Glaser, L., Knie, A., Lindahl, A. O., Plekan, O., Mahne, N., Mazza, T., Raimondi, L., Roussel, E., Scholz, F., Seltmann, J., Shevchuk, I., Svetina, C., Walter, P., Zangrando, M., Viefhaus, J., Grum-Grzhimailo, A. N., and Meyer, M. 2018. "Symmetry breakdown of electron emission in extreme ultraviolet photoionization of argon". United States. https://doi.org/10.1038/s41467-018-07152-7. https://www.osti.gov/servlets/purl/1490647.
@article{osti_1490647,
title = {Symmetry breakdown of electron emission in extreme ultraviolet photoionization of argon},
author = {Ilchen, Markus and Hartmann, G. and Gryzlova, E. V. and Achner, A. and Allaria, E. and Beckmann, A. and Braune, M. and Buck, J. and Callegari, C. and Coffee, R. N. and Cucini, R. and Danailov, M. and De Fanis, A. and Demidovich, A. and Ferrari, E. and Finetti, P. and Glaser, L. and Knie, A. and Lindahl, A. O. and Plekan, O. and Mahne, N. and Mazza, T. and Raimondi, L. and Roussel, E. and Scholz, F. and Seltmann, J. and Shevchuk, I. and Svetina, C. and Walter, P. and Zangrando, M. and Viefhaus, J. and Grum-Grzhimailo, A. N. and Meyer, M.},
abstractNote = {Short wavelength free-electron lasers (FELs), providing pulses of ultrahigh photon intensity, have revolutionized spectroscopy on ionic targets. Their exceptional photon flux enables multiple photon absorptions within a single femtosecond pulse, which in turn allows for deep insights into the photoionization process itself as well as into evolving ionic states of a target. Here we employ ultraintense pulses from the FEL FERMI to spectroscopically investigate the sequential emission of electrons from gaseous, atomic argon in the neutral as well as the ionic ground state. A pronounced forward-backward symmetry breaking of the angularly resolved emission patterns with respect to the light propagation direction is experimentally observed and theoretically explained for the region of the Cooper minimum, where the asymmetry of electron emission is strongly enhanced. Furthermore, these findings aim to originate a better understanding of the fundamentals of photon momentum transfer in ionic matter.},
doi = {10.1038/s41467-018-07152-7},
url = {https://www.osti.gov/biblio/1490647}, journal = {Nature Communications},
issn = {2041-1723},
number = 1,
volume = 9,
place = {United States},
year = {Wed Nov 07 00:00:00 EST 2018},
month = {Wed Nov 07 00:00:00 EST 2018}
}

Journal Article:
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Cited by: 25 works
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Figures / Tables:

Fig. 1 Fig. 1: Exemplary electron kinetic energy spectrum and PADs in the Cooper minimum of atomic argon Spectral cut-outs for the first step of ionization into Ar+ (3p5) (left) and two-photon sequential ionization into Ar2+ (3p4) 1S (green), 1D (red), and 3P (purple) ionic states (right) at a photon energy ofmore » 51 eV. The intensity of the second ionization step is scaled up by a factor of 5. The orange and gray arrows below the 1S and 1D indicate overlapping contributions from 3s ionization (see text). The depicted spectrum corresponds to only one of the 16 spectrometers at an angle of 45° with respect to the beam propagation for clearer illustration. For the final states Ar+ (3p5) (blue, left) and Ar2+ (3p4) 3P (purple, right), the three-dimensional photoelectron angular distribution (PAD) patterns are shown in the upper insets based on the experimental data of all 16 spectrometers (alignment plane shown in the insets, further details in the Methods section) to illustrate the asymmetry of the PADs in the Cooper minimum. The underlying coordinate system is depicted for better orientation (upper left, see also Eq. (1))« less

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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.