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Isolated attosecond pulse generation in a semi-infinite gas cell driven by time-gated phase matching

Vismarra, Federico ; Fernández-Galán, Marina ; Mocci, Daniele ; Colaizzi, Lorenzo ; Segundo, Víctor Wilfried ; Boyero-García, Roberto ; Serrano, Javier ; Conejero-Jarque, Enrique ; Pini, Marta and Mai, Lorenzo , et al. (2024) In Light: Science and Applications 13(1).
Abstract

Isolated attosecond pulse (IAP) generation usually involves the use of short-medium gas cells operated at high pressures. In contrast, long-medium schemes at low pressures are commonly perceived as inherently unsuitable for IAP generation due to the nonlinear phenomena that challenge favourable phase-matching conditions. Here we provide clear experimental evidence on the generation of isolated extreme-ultraviolet attosecond pulses in a semi-infinite gas cell, demonstrating the use of extended-medium geometries for effective production of IAPs. To gain a deeper understanding we develop a simulation method for high-order harmonic generation (HHG), which combines nonlinear propagation with macroscopic HHG solving the 3D time-dependent... (More)

Isolated attosecond pulse (IAP) generation usually involves the use of short-medium gas cells operated at high pressures. In contrast, long-medium schemes at low pressures are commonly perceived as inherently unsuitable for IAP generation due to the nonlinear phenomena that challenge favourable phase-matching conditions. Here we provide clear experimental evidence on the generation of isolated extreme-ultraviolet attosecond pulses in a semi-infinite gas cell, demonstrating the use of extended-medium geometries for effective production of IAPs. To gain a deeper understanding we develop a simulation method for high-order harmonic generation (HHG), which combines nonlinear propagation with macroscopic HHG solving the 3D time-dependent Schrödinger equation at the single-atom level. Our simulations reveal that the nonlinear spatio-temporal reshaping of the driving field, observed in the experiment as a bright plasma channel, acts as a self-regulating mechanism boosting the phase-matching conditions for the generation of IAPs.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Light: Science and Applications
volume
13
issue
1
article number
197
publisher
Nature Publishing Group
external identifiers
  • pmid:39164239
  • scopus:85201608404
ISSN
2095-5545
DOI
10.1038/s41377-024-01564-5
language
English
LU publication?
yes
id
d3e39ab2-9369-4e75-ac06-b4ddbe55b07e
date added to LUP
2024-10-28 15:01:33
date last changed
2025-07-23 03:14:32
@article{d3e39ab2-9369-4e75-ac06-b4ddbe55b07e,
  abstract     = {{<p>Isolated attosecond pulse (IAP) generation usually involves the use of short-medium gas cells operated at high pressures. In contrast, long-medium schemes at low pressures are commonly perceived as inherently unsuitable for IAP generation due to the nonlinear phenomena that challenge favourable phase-matching conditions. Here we provide clear experimental evidence on the generation of isolated extreme-ultraviolet attosecond pulses in a semi-infinite gas cell, demonstrating the use of extended-medium geometries for effective production of IAPs. To gain a deeper understanding we develop a simulation method for high-order harmonic generation (HHG), which combines nonlinear propagation with macroscopic HHG solving the 3D time-dependent Schrödinger equation at the single-atom level. Our simulations reveal that the nonlinear spatio-temporal reshaping of the driving field, observed in the experiment as a bright plasma channel, acts as a self-regulating mechanism boosting the phase-matching conditions for the generation of IAPs.</p>}},
  author       = {{Vismarra, Federico and Fernández-Galán, Marina and Mocci, Daniele and Colaizzi, Lorenzo and Segundo, Víctor Wilfried and Boyero-García, Roberto and Serrano, Javier and Conejero-Jarque, Enrique and Pini, Marta and Mai, Lorenzo and Wu, Yingxuan and Wörner, Hans Jakob and Appi, Elisa and Arnold, Cord L. and Reduzzi, Maurizio and Lucchini, Matteo and San Román, Julio and Nisoli, Mauro and Hernández-García, Carlos and Borrego-Varillas, Rocío}},
  issn         = {{2095-5545}},
  language     = {{eng}},
  number       = {{1}},
  publisher    = {{Nature Publishing Group}},
  series       = {{Light: Science and Applications}},
  title        = {{Isolated attosecond pulse generation in a semi-infinite gas cell driven by time-gated phase matching}},
  url          = {{http://dx.doi.org/10.1038/s41377-024-01564-5}},
  doi          = {{10.1038/s41377-024-01564-5}},
  volume       = {{13}},
  year         = {{2024}},
}