Spectral Shift and Split of Harmonic Lines in Propagation Affected High Harmonic Generation in a Long-Interaction Gas Tube
While generating high harmonics in long media of helium gas, at certain laser intensities and chirp, the spectral shift and split of the harmonic lines were experimentally observed, sometimes exceeding one harmonic order. Beyond reporting these results, numerical simulations were performed to unders...
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MDPI AG
2023-12-01
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| author | Jozsef Seres Enikoe Seres Carles Serrat Thanh-Hung Dinh Noboru Hasegawa Masahiko Ishino Masaharu Nishikino Shinichi Namba |
| author_facet | Jozsef Seres Enikoe Seres Carles Serrat Thanh-Hung Dinh Noboru Hasegawa Masahiko Ishino Masaharu Nishikino Shinichi Namba |
| author_sort | Jozsef Seres |
| collection | DOAJ |
| description | While generating high harmonics in long media of helium gas, at certain laser intensities and chirp, the spectral shift and split of the harmonic lines were experimentally observed, sometimes exceeding one harmonic order. Beyond reporting these results, numerical simulations were performed to understand the phenomenon. A 3D propagation model was solved under the strong field approximation. According to the simulations, the distortion of the laser beam profile during propagation and the consequently accused change in the conditions of phase matching are responsible for the observations. The observed phenomena can be an excellent tool to produce tunable narrow band harmonic sources covering a broad range around 13.5 nm for spectroscopy and for seeding X-ray lasers, and to understand non-desired detuning of the seed wavelength. |
| first_indexed | 2024-03-08T21:00:24Z |
| format | Article |
| id | doaj.art-35db769e511440e6b1b87f7a88cca20b |
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| issn | 2218-2004 |
| language | English |
| last_indexed | 2024-03-08T21:00:24Z |
| publishDate | 2023-12-01 |
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| record_format | Article |
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| spelling | doaj.art-35db769e511440e6b1b87f7a88cca20b2023-12-22T13:53:02ZengMDPI AGAtoms2218-20042023-12-01111215010.3390/atoms11120150Spectral Shift and Split of Harmonic Lines in Propagation Affected High Harmonic Generation in a Long-Interaction Gas TubeJozsef Seres0Enikoe Seres1Carles Serrat2Thanh-Hung Dinh3Noboru Hasegawa4Masahiko Ishino5Masaharu Nishikino6Shinichi Namba7Institute of Atomic and Subatomic Physics E-141, Vienna University of Technology, Stadionallee 2, 1020 Vienna, AustriaInstitute of Atomic and Subatomic Physics E-141, Vienna University of Technology, Stadionallee 2, 1020 Vienna, AustriaDepartment of Physics, Polytechnic University of Catalonia, Colom 11, 08222 Terrassa, SpainKansai Institute for Photon Science, National Institutes for Quantum Science and Technology (QST), Kizugawa 619-0215, JapanKansai Institute for Photon Science, National Institutes for Quantum Science and Technology (QST), Kizugawa 619-0215, JapanKansai Institute for Photon Science, National Institutes for Quantum Science and Technology (QST), Kizugawa 619-0215, JapanKansai Institute for Photon Science, National Institutes for Quantum Science and Technology (QST), Kizugawa 619-0215, JapanGraduate School of Advanced Science and Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashihiroshima 739-8527, JapanWhile generating high harmonics in long media of helium gas, at certain laser intensities and chirp, the spectral shift and split of the harmonic lines were experimentally observed, sometimes exceeding one harmonic order. Beyond reporting these results, numerical simulations were performed to understand the phenomenon. A 3D propagation model was solved under the strong field approximation. According to the simulations, the distortion of the laser beam profile during propagation and the consequently accused change in the conditions of phase matching are responsible for the observations. The observed phenomena can be an excellent tool to produce tunable narrow band harmonic sources covering a broad range around 13.5 nm for spectroscopy and for seeding X-ray lasers, and to understand non-desired detuning of the seed wavelength.https://www.mdpi.com/2218-2004/11/12/150high harmonic generationlight–atom interactionnon-linear propagationstrong-field physics |
| spellingShingle | Jozsef Seres Enikoe Seres Carles Serrat Thanh-Hung Dinh Noboru Hasegawa Masahiko Ishino Masaharu Nishikino Shinichi Namba Spectral Shift and Split of Harmonic Lines in Propagation Affected High Harmonic Generation in a Long-Interaction Gas Tube Atoms high harmonic generation light–atom interaction non-linear propagation strong-field physics |
| title | Spectral Shift and Split of Harmonic Lines in Propagation Affected High Harmonic Generation in a Long-Interaction Gas Tube |
| title_full | Spectral Shift and Split of Harmonic Lines in Propagation Affected High Harmonic Generation in a Long-Interaction Gas Tube |
| title_fullStr | Spectral Shift and Split of Harmonic Lines in Propagation Affected High Harmonic Generation in a Long-Interaction Gas Tube |
| title_full_unstemmed | Spectral Shift and Split of Harmonic Lines in Propagation Affected High Harmonic Generation in a Long-Interaction Gas Tube |
| title_short | Spectral Shift and Split of Harmonic Lines in Propagation Affected High Harmonic Generation in a Long-Interaction Gas Tube |
| title_sort | spectral shift and split of harmonic lines in propagation affected high harmonic generation in a long interaction gas tube |
| topic | high harmonic generation light–atom interaction non-linear propagation strong-field physics |
| url | https://www.mdpi.com/2218-2004/11/12/150 |
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