دورية أكاديمية
THz field engineering in two-color femtosecond filaments using chirped and delayed laser pulses
العنوان: | THz field engineering in two-color femtosecond filaments using chirped and delayed laser pulses |
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المؤلفون: | A Nguyen, P González de Alaiza Martínez, I Thiele, S Skupin, L Bergé |
المصدر: | New Journal of Physics, Vol 20, Iss 3, p 033026 (2018) |
بيانات النشر: | IOP Publishing, 2018. |
سنة النشر: | 2018 |
المجموعة: | LCC:Science LCC:Physics |
مصطلحات موضوعية: | terahertz generation, chirp, plasma, filamentation, wave propagation, 42.65.Re, Science, Physics, QC1-999 |
الوصف: | 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 . |
نوع الوثيقة: | article |
وصف الملف: | electronic resource |
اللغة: | English |
تدمد: | 1367-2630 |
العلاقة: | https://doaj.org/toc/1367-2630Test |
DOI: | 10.1088/1367-2630/aaa470 |
الوصول الحر: | https://doaj.org/article/bf176ae1bb4a481eb2d27385a41bc41dTest |
رقم الانضمام: | edsdoj.bf176ae1bb4a481eb2d27385a41bc41d |
قاعدة البيانات: | Directory of Open Access Journals |
تدمد: | 13672630 |
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DOI: | 10.1088/1367-2630/aaa470 |