Terahertz radiation from a laser plasma filament

Journal Article · Tue Mar 15 04:00:00 EDT 2011 · Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics (Print)

DOI:https://doi.org/10.1103/PHYSREVE.83.036407· OSTI ID:21560080

Wu, H -C; Meyer-ter-Vehn, J ^[1]; Ruhl, H ^[2]; Sheng, Z -M ^[3]

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1. Max-Planck-Institut fuer Quantenoptik, D-85748 Garching (Germany)
2. Department fuer Physik der Ludwig-Maximillians-Universitaet, Theresienstrasse 37A, D-80333 Muenchen (Germany)
3. Institute of Plasma Studies, Department of Physics, Shanghai Jiaotong University, Shanghai 200240 (China)

By the use of two-dimensional particle-in-cell simulations, we clarify the terahertz (THz) radiation mechanism from a plasma filament formed by an intense femtosecond laser pulse. The nonuniform plasma density of the filament leads to a net radiating current for THz radiation. This current is mainly located within the pulse and the first cycle of the wakefield. As the laser pulse propagates, a single-cycle and radially polarized THz pulse is constructively built up forward. The single-cycle shape is mainly due to radiation damping effect.

• OSTI ID: 21560080
• Journal Information: Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics (Print), Journal Name: Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics (Print) Journal Issue: 3 Vol. 83; ISSN 1539-3755
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CURRENTS
DAMPING
ELECTROMAGNETIC RADIATION
FREQUENCY RANGE
LASER RADIATION
PARTICLES
PLASMA DENSITY
PLASMA FILAMENT
PULSES
RADIATIONS
SIMULATION
THZ RANGE
TWO-DIMENSIONAL CALCULATIONS