THz field engineering in two-color femtosecond filaments using chirped and delayed laser pulses
We numerically study the influence of chirping and delaying several ionizing two-color light pulses in order to engineer terahertz (THz) wave generation in air. By means of comprehensive 3D simulations, it is shown that two chirped pulses can increase the THz yield when they are separated by a suita...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2018-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/aaa470 |
| _version_ | 1797750709282668544 |
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| author | A Nguyen P González de Alaiza Martínez I Thiele S Skupin L Bergé |
| author_facet | A Nguyen P González de Alaiza Martínez I Thiele S Skupin L Bergé |
| author_sort | A Nguyen |
| collection | DOAJ |
| description | We numerically study the influence of chirping and delaying several ionizing two-color light pulses in order to engineer terahertz (THz) wave generation in air. By means of comprehensive 3D simulations, it is shown that two chirped pulses can increase the THz yield when they are separated by a suitable time delay for the same laser energy in focused propagation geometry. To interpret these results, the local current theory is revisited and we propose an easy, accessible all-optical criterion that predicts the laser-to-THz conversion efficiencies given any input laser spectrum. In the filamentation regime, numerical simulations display evidence that a chirped pulse is able to produce more THz radiation due to propagation effects, which maintain the two colors of the laser field more efficiently coupled over long distances. A large delay between two pulses promotes multi-peaked THz spectra as well as conversion efficiencies above 10 ^−4 . |
| first_indexed | 2024-03-12T16:36:46Z |
| format | Article |
| id | doaj.art-bf176ae1bb4a481eb2d27385a41bc41d |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:36:46Z |
| publishDate | 2018-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-bf176ae1bb4a481eb2d27385a41bc41d2023-08-08T14:50:48ZengIOP PublishingNew Journal of Physics1367-26302018-01-0120303302610.1088/1367-2630/aaa470THz field engineering in two-color femtosecond filaments using chirped and delayed laser pulsesA Nguyen0P González de Alaiza Martínez1I Thiele2S Skupin3https://orcid.org/0000-0002-9215-1150L Bergé4https://orcid.org/0000-0002-5531-7692CEA, DAM, DIF, F-91297 Arpajon, FranceUniv. Bordeaux—CNRS—CEA, Centre Lasers Intenses et Applications , UMR 5107, F-33405 Talence, FranceUniv. Bordeaux—CNRS—CEA, Centre Lasers Intenses et Applications , UMR 5107, F-33405 Talence, FranceInstitut Lumière Matière, UMR 5306 Université Lyon 1—CNRS, Université de Lyon , F-69622 Villeurbanne, FranceCEA, DAM, DIF, F-91297 Arpajon, FranceWe numerically study the influence of chirping and delaying several ionizing two-color light pulses in order to engineer terahertz (THz) wave generation in air. By means of comprehensive 3D simulations, it is shown that two chirped pulses can increase the THz yield when they are separated by a suitable time delay for the same laser energy in focused propagation geometry. To interpret these results, the local current theory is revisited and we propose an easy, accessible all-optical criterion that predicts the laser-to-THz conversion efficiencies given any input laser spectrum. In the filamentation regime, numerical simulations display evidence that a chirped pulse is able to produce more THz radiation due to propagation effects, which maintain the two colors of the laser field more efficiently coupled over long distances. A large delay between two pulses promotes multi-peaked THz spectra as well as conversion efficiencies above 10 ^−4 .https://doi.org/10.1088/1367-2630/aaa470terahertz generationchirpplasmafilamentationwave propagation42.65.Re |
| spellingShingle | A Nguyen P González de Alaiza Martínez I Thiele S Skupin L Bergé THz field engineering in two-color femtosecond filaments using chirped and delayed laser pulses New Journal of Physics terahertz generation chirp plasma filamentation wave propagation 42.65.Re |
| title | THz field engineering in two-color femtosecond filaments using chirped and delayed laser pulses |
| title_full | THz field engineering in two-color femtosecond filaments using chirped and delayed laser pulses |
| title_fullStr | THz field engineering in two-color femtosecond filaments using chirped and delayed laser pulses |
| title_full_unstemmed | THz field engineering in two-color femtosecond filaments using chirped and delayed laser pulses |
| title_short | THz field engineering in two-color femtosecond filaments using chirped and delayed laser pulses |
| title_sort | thz field engineering in two color femtosecond filaments using chirped and delayed laser pulses |
| topic | terahertz generation chirp plasma filamentation wave propagation 42.65.Re |
| url | https://doi.org/10.1088/1367-2630/aaa470 |
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