Influence of tunnel ionization to third-harmonic generation of infrared femtosecond laser pulses in air

Here we present an experimental as well as theoretical study of third-harmonic generation in tightly focused femtosecond filaments in air at the wavelength of [Formula: see text] . At low intensities, longitudinal phase matching is dominating in the formation of 3rd harmonics, whereas at higher inte...

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Autores principales: Tamulienė, Viktorija, Juškevičiūtė, Greta, Buožius, Danas, Vaičaitis, Virgilijus, Babushkin, Ihar, Morgner, Uwe
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2020
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7566598/
https://www.ncbi.nlm.nih.gov/pubmed/33060640
http://dx.doi.org/10.1038/s41598-020-74263-x
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author Tamulienė, Viktorija
Juškevičiūtė, Greta
Buožius, Danas
Vaičaitis, Virgilijus
Babushkin, Ihar
Morgner, Uwe
author_facet Tamulienė, Viktorija
Juškevičiūtė, Greta
Buožius, Danas
Vaičaitis, Virgilijus
Babushkin, Ihar
Morgner, Uwe
author_sort Tamulienė, Viktorija
collection PubMed
description Here we present an experimental as well as theoretical study of third-harmonic generation in tightly focused femtosecond filaments in air at the wavelength of [Formula: see text] . At low intensities, longitudinal phase matching is dominating in the formation of 3rd harmonics, whereas at higher intensities locked X-waves are formed. We provide the arguments that the X-wave formation is governed mainly by the tunnel-like ionization dynamics rather than by the multiphoton one. Despite of this fact, the impact of the ionization-induced nonlinearity is lower than the one from bound–bound transitions at all intensities.
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spelling pubmed-75665982020-10-19 Influence of tunnel ionization to third-harmonic generation of infrared femtosecond laser pulses in air Tamulienė, Viktorija Juškevičiūtė, Greta Buožius, Danas Vaičaitis, Virgilijus Babushkin, Ihar Morgner, Uwe Sci Rep Article Here we present an experimental as well as theoretical study of third-harmonic generation in tightly focused femtosecond filaments in air at the wavelength of [Formula: see text] . At low intensities, longitudinal phase matching is dominating in the formation of 3rd harmonics, whereas at higher intensities locked X-waves are formed. We provide the arguments that the X-wave formation is governed mainly by the tunnel-like ionization dynamics rather than by the multiphoton one. Despite of this fact, the impact of the ionization-induced nonlinearity is lower than the one from bound–bound transitions at all intensities. Nature Publishing Group UK 2020-10-15 /pmc/articles/PMC7566598/ /pubmed/33060640 http://dx.doi.org/10.1038/s41598-020-74263-x Text en © The Author(s) 2020 Open AccessThis 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/.
spellingShingle Article
Tamulienė, Viktorija
Juškevičiūtė, Greta
Buožius, Danas
Vaičaitis, Virgilijus
Babushkin, Ihar
Morgner, Uwe
Influence of tunnel ionization to third-harmonic generation of infrared femtosecond laser pulses in air
title Influence of tunnel ionization to third-harmonic generation of infrared femtosecond laser pulses in air
title_full Influence of tunnel ionization to third-harmonic generation of infrared femtosecond laser pulses in air
title_fullStr Influence of tunnel ionization to third-harmonic generation of infrared femtosecond laser pulses in air
title_full_unstemmed Influence of tunnel ionization to third-harmonic generation of infrared femtosecond laser pulses in air
title_short Influence of tunnel ionization to third-harmonic generation of infrared femtosecond laser pulses in air
title_sort influence of tunnel ionization to third-harmonic generation of infrared femtosecond laser pulses in air
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7566598/
https://www.ncbi.nlm.nih.gov/pubmed/33060640
http://dx.doi.org/10.1038/s41598-020-74263-x
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