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Phase-matched high-order harmonic generation in pre-ionized noble gases

One of the main difficulties of efficiently generating high-order harmonics in long neutral-gas targets is to reach the phase-matching conditions. The issue is that the medium cannot be sufficiently ionized by the driving laser due to plasma defocusing. We propose a method to improve the phase-match...

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Autores principales: Finke, O., Vábek, J., Nevrkla, M., Bobrova, N., Hort, O., Jurkovičová, L., Albrecht, M., Jančárek, A., Catoire, F., Skupin, S., Nejdl, J.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9095879/
https://www.ncbi.nlm.nih.gov/pubmed/35546598
http://dx.doi.org/10.1038/s41598-022-11313-6
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author Finke, O.
Vábek, J.
Nevrkla, M.
Bobrova, N.
Hort, O.
Jurkovičová, L.
Albrecht, M.
Jančárek, A.
Catoire, F.
Skupin, S.
Nejdl, J.
author_facet Finke, O.
Vábek, J.
Nevrkla, M.
Bobrova, N.
Hort, O.
Jurkovičová, L.
Albrecht, M.
Jančárek, A.
Catoire, F.
Skupin, S.
Nejdl, J.
author_sort Finke, O.
collection PubMed
description One of the main difficulties of efficiently generating high-order harmonics in long neutral-gas targets is to reach the phase-matching conditions. The issue is that the medium cannot be sufficiently ionized by the driving laser due to plasma defocusing. We propose a method to improve the phase-matching by pre-ionizing the gas using a weak capillary discharge. We have demonstrated this mechanism, for the first time, in absorption-limited XUV generation by an 800 nm femtosecond laser in argon and krypton. The ability to control phase-mismatch is confirmed by an analytical model and numerical simulations of the entire generation process. Our method allows to increase the efficiency of the harmonic generation significantly, paving the way towards photon-hungry applications of these compact short-wavelength sources.
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spelling pubmed-90958792022-05-13 Phase-matched high-order harmonic generation in pre-ionized noble gases Finke, O. Vábek, J. Nevrkla, M. Bobrova, N. Hort, O. Jurkovičová, L. Albrecht, M. Jančárek, A. Catoire, F. Skupin, S. Nejdl, J. Sci Rep Article One of the main difficulties of efficiently generating high-order harmonics in long neutral-gas targets is to reach the phase-matching conditions. The issue is that the medium cannot be sufficiently ionized by the driving laser due to plasma defocusing. We propose a method to improve the phase-matching by pre-ionizing the gas using a weak capillary discharge. We have demonstrated this mechanism, for the first time, in absorption-limited XUV generation by an 800 nm femtosecond laser in argon and krypton. The ability to control phase-mismatch is confirmed by an analytical model and numerical simulations of the entire generation process. Our method allows to increase the efficiency of the harmonic generation significantly, paving the way towards photon-hungry applications of these compact short-wavelength sources. Nature Publishing Group UK 2022-05-11 /pmc/articles/PMC9095879/ /pubmed/35546598 http://dx.doi.org/10.1038/s41598-022-11313-6 Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Finke, O.
Vábek, J.
Nevrkla, M.
Bobrova, N.
Hort, O.
Jurkovičová, L.
Albrecht, M.
Jančárek, A.
Catoire, F.
Skupin, S.
Nejdl, J.
Phase-matched high-order harmonic generation in pre-ionized noble gases
title Phase-matched high-order harmonic generation in pre-ionized noble gases
title_full Phase-matched high-order harmonic generation in pre-ionized noble gases
title_fullStr Phase-matched high-order harmonic generation in pre-ionized noble gases
title_full_unstemmed Phase-matched high-order harmonic generation in pre-ionized noble gases
title_short Phase-matched high-order harmonic generation in pre-ionized noble gases
title_sort phase-matched high-order harmonic generation in pre-ionized noble gases
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9095879/
https://www.ncbi.nlm.nih.gov/pubmed/35546598
http://dx.doi.org/10.1038/s41598-022-11313-6
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