Atomic partial wave meter by attosecond coincidence metrology

Wenyu Jiang, Gregory S. J. Armstrong, Jihong Tong, Yidan Xu, Zitan Zuo, Junjie Qiang, Peifen Lu, Daniel D. A. Clarke, Jakub Benda, Avner Fleischer, Hongcheng Ni, Kiyoshi Ueda, Hugo W. Hart, Andrew C. Brown (), Xiaochun Gong () and Jian Wu ()
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Wenyu Jiang: East China Normal University
Gregory S. J. Armstrong: Queen’s University Belfast
Jihong Tong: East China Normal University
Yidan Xu: East China Normal University
Zitan Zuo: East China Normal University
Junjie Qiang: East China Normal University
Peifen Lu: East China Normal University
Daniel D. A. Clarke: School of Physics and CRANN Institute, Trinity College Dublin
Jakub Benda: Institute of Theoretical Physics, Faculty of Mathematics and Physics, Charles University
Avner Fleischer: Tel Aviv University
Hongcheng Ni: East China Normal University
Kiyoshi Ueda: East China Normal University
Hugo W. Hart: Queen’s University Belfast
Andrew C. Brown: Queen’s University Belfast
Xiaochun Gong: East China Normal University
Jian Wu: East China Normal University

Nature Communications, 2022, vol. 13, issue 1, 1-9

Abstract: Abstract Attosecond chronoscopy is central to the understanding of ultrafast electron dynamics in matter from gas to the condensed phase with attosecond temporal resolution. It has, however, not yet been possible to determine the timing of individual partial waves, and steering their contribution has been a substantial challenge. Here, we develop a polarization-skewed attosecond chronoscopy serving as a partial wave meter to reveal the role of each partial wave from the angle-resolved photoionization phase shifts in rare gas atoms. We steer the relative ratio between different partial waves and realize a magnetic-sublevel-resolved atomic phase shift measurement. Our experimental observations are well supported by time-dependent R-matrix numerical simulations and analytical soft-photon approximation analysis. The symmetry-resolved, partial-wave analysis identifies the transition rate and phase shift property in the attosecond photoelectron emission dynamics. Our findings provide critical insights into the ubiquitous attosecond optical timer and the underlying attosecond photoionization dynamics.

Date: 2022
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DOI: 10.1038/s41467-022-32753-8

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