Two-dimensional plasma grating by non-collinear femtosecond filament interaction in air

Journal Article · Mon Oct 10 00:00:00 EDT 2011 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3650709· OSTI ID:22027771

Jia, Liu; Wenxue, Li; Haifeng, Pan; Heping, Zeng ^[1]

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1. State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062 (China)

We experimentally demonstrated that two-dimensional (2D) plasma gratings could be generated in air by nonlinear interaction of three femtosecond filaments. The intensity interference of non-collinearly overlapped filaments was self-projected along a relatively long distance and accompanied with a wavelength-scale periodic change of the refractive index in the encircling air due to periodic plasma density modulation. The 2D plasma gratings supported 2D diffraction of the generated third-harmonic pulses. By using in-line time-resolved holographic imaging and time-delayed diffraction, the 2D plasma gratings were evidenced to last a few tens picoseconds after the excitation pulses.

• OSTI ID: 22027771
• Journal Information: Applied Physics Letters, Vol. 99, Issue 15; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
AIR
DIFFRACTION
DIFFRACTION GRATINGS
EXCITATION
HOLOGRAPHY
INTERFERENCE
MODULATION
NONLINEAR PROBLEMS
PERIODICITY
PLASMA
PLASMA DENSITY
PLASMA DIAGNOSTICS
PLASMA FILAMENT
PULSES
REFRACTIVE INDEX
TIME DELAY
TIME RESOLUTION