Remote generation of high-energy terahertz pulses from two-color femtosecond laser filamentation in air

Journal Article · Sun May 15 04:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.83.053801· OSTI ID:21546851

Wang, T -J; Daigle, J -F; Yuan, S; Chin, S L ^[1]; Theberge, F; Chateauneuf, M; Dubois, J; Roy, G ^[2]; Zeng, H ^[3]

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1. Centre d'Optique, Photonique et Laser (COPL) and Departement de physique, de genie physique et d'optique, Universite Laval, Quebec, Quebec G1V 0A6 (Canada)
2. Defence Research and Development Canada-Valcartier, 2459 Pie-XI Boulevard North, Quebec, Quebec G3J 1X5 (Canada)
3. State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062 (China)

We experimentally investigated the dynamic behavior of remote terahertz (THz) generation from two-color femtosecond laser-induced filamentation in air. A record-high THz pulse energy of 570 nJ at frequency below 5.5 THz was measured by optimizing the pump parameters at a controllable remote distance of 16 m, while super-broadband THz (<300 THz) pulse energy was up to 2.8 {mu}J. A further energy-scaling possibility was proposed. By analyzing simultaneously the fluorescence from both neutral N{sub 2} and N{sub 2}{sup +} in the filament, we found that the enhancement of THz radiation was due principally to guiding of the weak second-harmonic pulse inside the filament of the first strong fundamental pulse.

• OSTI ID: 21546851
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 5 Vol. 83; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
74 ATOMIC AND MOLECULAR PHYSICS
AIR
CHARGED PARTICLES
COLOR
ELECTROMAGNETIC RADIATION
ELEMENTS
EMISSION
FILAMENTS
FLUIDS
FLUORESCENCE
FREQUENCY RANGE
GASES
IONS
LASER RADIATION
LUMINESCENCE
MOLECULAR IONS
MOLECULES
NITROGEN
NONMETALS
OPTICAL PROPERTIES
OPTICAL PUMPING
OPTIMIZATION
ORGANOLEPTIC PROPERTIES
PHOTON EMISSION
PHYSICAL PROPERTIES
PULSES
PUMPING
RADIATIONS
SCALING
THZ RANGE