Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

Role of intermediate resonances in attosecond photoelectron interferometry in neon

Moioli, M. ; Popova, M. M. ; Hamilton, K. R. ; Ertel, D. ; Busto, D. LU orcid ; Makos, I. ; Kiselev, M. D. ; Yudin, S. N. ; Ahmadi, H. and Schröter, C. D. , et al. (2025) In Physical Review Research 7(2).
Abstract

Attosecond photoelectron interferometry based on the combination of an attosecond pulse train and a synchronized infrared field is a fundamental technique for the temporal characterization of attosecond waveforms and for the investigation of electron dynamics in the photoionization process. In this approach, the comb of extreme ultraviolet harmonics typically lies above the ionization threshold of the target under investigation, thus releasing a photoelectron by single-photon absorption. The interaction of the outgoing photoelectron with the infrared pulse results in the absorption or emission of infrared photons, thereby creating additional peaks in the photoelectron spectrum, referred to as sidebands. While, in the absence of... (More)

Attosecond photoelectron interferometry based on the combination of an attosecond pulse train and a synchronized infrared field is a fundamental technique for the temporal characterization of attosecond waveforms and for the investigation of electron dynamics in the photoionization process. In this approach, the comb of extreme ultraviolet harmonics typically lies above the ionization threshold of the target under investigation, thus releasing a photoelectron by single-photon absorption. The interaction of the outgoing photoelectron with the infrared pulse results in the absorption or emission of infrared photons, thereby creating additional peaks in the photoelectron spectrum, referred to as sidebands. While, in the absence of resonances in the first ionization step, the phases imparted on the photoionization process evolve smoothly with the photon energy, the presence of intermediate resonances imprints a large additional phase on the outgoing photoelectron wave packet. In this paper, using a comb of harmonics below and above the ionization threshold of neon, we investigate the effect of intermediate bound excited states on attosecond photoelectron interferometry. We show that the phase of the oscillations of the sidebands and their angular distributions are strongly affected by such resonances. By slightly tuning the photon energies of the extreme ultraviolet harmonics, we show how the contributions of selected resonances can be enhanced or suppressed.

(Less)
Please use this url to cite or link to this publication:
author
; ; ; ; ; ; ; ; and , et al. (More)
; ; ; ; ; ; ; ; ; ; ; ; ; ; and (Less)
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review Research
volume
7
issue
2
article number
023034
publisher
American Physical Society
external identifiers
  • scopus:105002575804
ISSN
2643-1564
DOI
10.1103/PhysRevResearch.7.023034
language
English
LU publication?
yes
id
e9094fee-ef2c-40c8-a86f-882cf98fe4ea
date added to LUP
2025-08-19 13:22:26
date last changed
2025-10-14 10:25:05
@article{e9094fee-ef2c-40c8-a86f-882cf98fe4ea,
  abstract     = {{<p>Attosecond photoelectron interferometry based on the combination of an attosecond pulse train and a synchronized infrared field is a fundamental technique for the temporal characterization of attosecond waveforms and for the investigation of electron dynamics in the photoionization process. In this approach, the comb of extreme ultraviolet harmonics typically lies above the ionization threshold of the target under investigation, thus releasing a photoelectron by single-photon absorption. The interaction of the outgoing photoelectron with the infrared pulse results in the absorption or emission of infrared photons, thereby creating additional peaks in the photoelectron spectrum, referred to as sidebands. While, in the absence of resonances in the first ionization step, the phases imparted on the photoionization process evolve smoothly with the photon energy, the presence of intermediate resonances imprints a large additional phase on the outgoing photoelectron wave packet. In this paper, using a comb of harmonics below and above the ionization threshold of neon, we investigate the effect of intermediate bound excited states on attosecond photoelectron interferometry. We show that the phase of the oscillations of the sidebands and their angular distributions are strongly affected by such resonances. By slightly tuning the photon energies of the extreme ultraviolet harmonics, we show how the contributions of selected resonances can be enhanced or suppressed.</p>}},
  author       = {{Moioli, M. and Popova, M. M. and Hamilton, K. R. and Ertel, D. and Busto, D. and Makos, I. and Kiselev, M. D. and Yudin, S. N. and Ahmadi, H. and Schröter, C. D. and Pfeifer, T. and Moshammer, R. and Gryzlova, E. V. and Grum-Grzhimailo, A. N. and Bartschat, K. and Sansone, G.}},
  issn         = {{2643-1564}},
  language     = {{eng}},
  number       = {{2}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review Research}},
  title        = {{Role of intermediate resonances in attosecond photoelectron interferometry in neon}},
  url          = {{http://dx.doi.org/10.1103/PhysRevResearch.7.023034}},
  doi          = {{10.1103/PhysRevResearch.7.023034}},
  volume       = {{7}},
  year         = {{2025}},
}