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Attosecond temporal structure of non-consecutive harmonic combs revealed by multiple near-infrared photon transitions in two-color photoionisation

Maroju, Praveen Kumar LU ; Benito de Lama, Miguel ; Di Fraia, Michele ; Plekan, Oksana ; Bonanomi, Matteo ; Merzuk, Barbara ; Busto, David LU orcid ; Makos, Ioannis ; Schmoll, Marvin and Shah, Ronak , et al. (2025) In Communications Physics 8(1).
Abstract

The metrology of attosecond pulse trains is based on a cross-correlation technique between a comb of extreme ultraviolet harmonics generated by the high-order harmonic generation process and a synchronised infrared field. The approach, usually referred to as reconstruction of attosecond beating by interference of two-photon transitions (RABBIT), allows one to recover the relative phase between the comb of consecutive odd harmonics, thus providing access to the attosecond temporal structure of the radiation. Seeded free-electron lasers have recently demonstrated the generation of combs consisting of even and odd harmonics of the seeding radiation. In this scheme, each harmonic is generated by an independent undulator (or set thereof),... (More)

The metrology of attosecond pulse trains is based on a cross-correlation technique between a comb of extreme ultraviolet harmonics generated by the high-order harmonic generation process and a synchronised infrared field. The approach, usually referred to as reconstruction of attosecond beating by interference of two-photon transitions (RABBIT), allows one to recover the relative phase between the comb of consecutive odd harmonics, thus providing access to the attosecond temporal structure of the radiation. Seeded free-electron lasers have recently demonstrated the generation of combs consisting of even and odd harmonics of the seeding radiation. In this scheme, each harmonic is generated by an independent undulator (or set thereof), providing an additional degree of freedom in selecting the specific harmonics that make up the extreme ultraviolet comb. Here, we present results on the generation and temporal characterisation of a comb consisting of non-consecutive harmonics. The single-shot correlation analysis of the photoelectron spectra and the reordering of the single-shot data using an attosecond timing tool allow the reconstruction of the group delay dispersion of the harmonic comb and the temporal reconstruction of the attosecond pulse train.

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type
Contribution to journal
publication status
published
subject
in
Communications Physics
volume
8
issue
1
article number
207
publisher
Nature Publishing Group
external identifiers
  • scopus:105005979027
ISSN
2399-3650
DOI
10.1038/s42005-025-02123-z
language
English
LU publication?
yes
id
258f1423-4eef-422b-8e3e-c42cf793f0e7
date added to LUP
2025-07-15 09:24:02
date last changed
2025-07-15 09:25:10
@article{258f1423-4eef-422b-8e3e-c42cf793f0e7,
  abstract     = {{<p>The metrology of attosecond pulse trains is based on a cross-correlation technique between a comb of extreme ultraviolet harmonics generated by the high-order harmonic generation process and a synchronised infrared field. The approach, usually referred to as reconstruction of attosecond beating by interference of two-photon transitions (RABBIT), allows one to recover the relative phase between the comb of consecutive odd harmonics, thus providing access to the attosecond temporal structure of the radiation. Seeded free-electron lasers have recently demonstrated the generation of combs consisting of even and odd harmonics of the seeding radiation. In this scheme, each harmonic is generated by an independent undulator (or set thereof), providing an additional degree of freedom in selecting the specific harmonics that make up the extreme ultraviolet comb. Here, we present results on the generation and temporal characterisation of a comb consisting of non-consecutive harmonics. The single-shot correlation analysis of the photoelectron spectra and the reordering of the single-shot data using an attosecond timing tool allow the reconstruction of the group delay dispersion of the harmonic comb and the temporal reconstruction of the attosecond pulse train.</p>}},
  author       = {{Maroju, Praveen Kumar and Benito de Lama, Miguel and Di Fraia, Michele and Plekan, Oksana and Bonanomi, Matteo and Merzuk, Barbara and Busto, David and Makos, Ioannis and Schmoll, Marvin and Shah, Ronak and Rebernik Ribič, Primož and Giannessi, Luca and Allaria, Enrico and Penco, Giuseppe and Zangrando, Marco and Simoncig, Alberto and Manfredda, Michele and De Ninno, Giovanni and Spezzani, Carlo and Demidovich, Alexander and Danailov, Miltcho and Coreno, Marcello and Squibb, Richard J. and Feifel, Raimund and Bengtsson, Samuel and Simpson, Emma Rose and Csizmadia, Tamás and Dumergue, Mathieu and Kühn, Sergei and Ueda, Kiyoshi and Zeni, Gabriele and Frassetto, Fabio and Poletto, Luca and Prince, Kevin C. and Mauritsson, Johan and Feist, Johannes and Palacios, Alicia and Callegari, Carlo and Sansone, Giuseppe}},
  issn         = {{2399-3650}},
  language     = {{eng}},
  number       = {{1}},
  publisher    = {{Nature Publishing Group}},
  series       = {{Communications Physics}},
  title        = {{Attosecond temporal structure of non-consecutive harmonic combs revealed by multiple near-infrared photon transitions in two-color photoionisation}},
  url          = {{http://dx.doi.org/10.1038/s42005-025-02123-z}},
  doi          = {{10.1038/s42005-025-02123-z}},
  volume       = {{8}},
  year         = {{2025}},
}