Laser beat wave resonant terahertz generation in a magnetized plasma channel

Journal Article · Mon Feb 15 00:00:00 EST 2016 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4940962· OSTI ID:22493887

Bhasin, Lalita; Tripathi, V. K. ^[1]; Kumar, Pawan ^[2]

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1. Department of Physics, Indian Institute of Technology Delhi, New Delhi 110016 (India)
2. Department of Physics, Raj Kumar Goel Institute of Technology, Ghaziabad, Uttar Pradesh 201003 (India)

Resonant excitation of terahertz (THz) radiation by nonlinear mixing of two lasers in a ripple-free self created plasma channel is investigated. The channel has a transverse static magnetic field and supports a THz X-mode with phase velocity close to the speed of light in vacuum when the frequency of the mode is close to plasma frequency on the channel axis and its value decreases with the intensity of lasers. The THz is resonantly driven by the laser beat wave ponderomotive force. The THz amplitude scales almost three half power of the intensity of lasers as the width of the THz eigen mode shrinks with laser intensity.

• OSTI ID: 22493887
• Journal Information: Physics of Plasmas, Vol. 23, Issue 2; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
AMPLITUDES
EXCITATION
LANGMUIR FREQUENCY
LASERS
MAGNETIC FIELDS
NONLINEAR PROBLEMS
PHASE VELOCITY
PLASMA
PONDEROMOTIVE FORCE
THZ RANGE
VISIBLE RADIATION