Observation of chromatic effects in high-order harmonic generation

Xiaomeng Liu, Antonios Pelekanidis, Mengqi Du, Fengling Zhang, Kjeld S.E. Eikema, Stefan Witte

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

High-harmonic generation sources can produce coherent, broadband radiation at extreme-ultraviolet and soft-x-ray wavelengths. The wavefronts of the generated high-order harmonics are influenced by the incident laser field, the generation conditions, and geometry. These influences depend on harmonic wavelength, which may result in wavelength-dependent focusing properties and spatiotemporal couplings that can affect attosecond physics experiments. We experimentally demonstrate and characterize these chromatic effects in high-harmonic generation by measuring the spectrally resolved high-harmonic wavefronts as a function of generation conditions. We find that the high-harmonic generation process can have significant intrinsic chromatic aberration, particularly for converging incident laser fields. Furthermore, we identify regimes where chromatic effects can be minimized, and show that analytical single-atom models allow accurate predictions of harmonic wavefronts produced by a specific driving field.

Original languageEnglish
Article number043100
Pages (from-to)1-9
Number of pages9
JournalPhysical Review Research
Volume5
Issue number4
Early online date31 Oct 2023
DOIs
Publication statusPublished - Dec 2023

Bibliographical note

Funding Information:
We acknowledge funding from the European Research Council (ERC-CoG 864016), the Netherlands Organisation for Scientific Research NWO through the LINX Perspectief Programme, and Laserlab-Europe (H2020 EC-GA 871124).

Publisher Copyright:
© 2023 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

Funding

We acknowledge funding from the European Research Council (ERC-CoG 864016), the Netherlands Organisation for Scientific Research NWO through the LINX Perspectief Programme, and Laserlab-Europe (H2020 EC-GA 871124).

FundersFunder number
European Research Council
Horizon 2020 Framework Programme864016
Nederlandse Organisatie voor Wetenschappelijk OnderzoekH2020 EC-GA 871124

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