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

Journal Article · Sun May 15 00:00:00 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, Vol. 83, Issue 5; Other Information: DOI: 10.1103/PhysRevA.83.053801; (c) 2011 American Institute of Physics; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

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