Strong terahertz radiation by beating of spatial-triangular lasers in a plasma

Journal Article · Mon Aug 15 00:00:00 EDT 2011 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3626845· OSTI ID:22027709

Malik, Anil K; Malik, Hitendra K ^[1]; Stroth, Ulrich ^[2]

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1. Plasma Waves and Particle Acceleration Laboratory, Department of Physics, Indian Institute of Technology Delhi, New Delhi-110 016 (India)
2. Institute fuer Plasmaforschung, Universitaet Stuttgart, Stuttgart-70569 (Germany)

Resonant excitation of terahertz (THz) radiation by beating of two spatial-triangular laser beams having different frequencies and wave numbers but the same electric fields is proposed, where the ponderomotive force in the transverse direction is realized due to the beating and spatial variation of the lasers' fields. This gives rise to a stronger transient transverse current due to a sharp gradient in the laser field, and subsequently THz radiation is excited resonantly in the presence of a periodic density structure. The present scheme yields the THz field {approx}10{sup 5} kV/cm and the efficiency {approx}10{sup -2} for the laser intensity {approx}10{sup 14} W/cm{sup 2}.

• OSTI ID: 22027709
• Journal Information: Applied Physics Letters, Vol. 99, Issue 7; 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
BEAM-PLASMA SYSTEMS
ELECTRIC CURRENTS
ELECTRIC FIELDS
EXCITATION
LASER RADIATION
LASERS
LIGHT TRANSMISSION
NONLINEAR PROBLEMS
PERIODICITY
PHOTON BEAMS
PLASMA
PLASMA DENSITY
PONDEROMOTIVE FORCE
TRANSIENTS