Relativistic second harmonic generation from an S-polarized laser in over-dense plasma

Journal Article · Mon Aug 15 00:00:00 EDT 2011 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.3624496· OSTI ID:22043423

Adusumilli, K; Goyal, D; Tripathi, V K ^[1]

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1. Department of Physics, Indian Institute of Technology-Delhi, Delhi, New Delhi 110016 (India)

A relativistic S-polarized short pulse laser impinged obliquely on an overdense plasma thin foil is shown to produce very significant second harmonic in the direction of specular reflection. The second harmonic is P-polarized and is driven by the second harmonic ponderomotive force on electrons in the skin layer. The treatment incorporates the electron density modification by the static ponderomotive force and mass modification due to relativistic effects. The second harmonic reflected amplitude is greatest for an optimum value of the angle of incidence. The conversion efficiency of the second harmonic is greater for higher values of incident laser amplitude and lower values of electron density in the foil. The equivalence between the total ponderomotive force and the radiation pressure force is also demonstrated.

• OSTI ID: 22043423
• Journal Information: Physics of Plasmas, Vol. 18, Issue 8; Other Information: (c) 2011 American Institute of Physics; 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
ELECTRON DENSITY
ELECTRONS
HARMONIC GENERATION
INCIDENCE ANGLE
LASER RADIATION
LAYERS
LIGHT TRANSMISSION
MASS
MODIFICATIONS
NONLINEAR PROBLEMS
PLASMA DENSITY
POLARIZED BEAMS
PONDEROMOTIVE FORCE
PULSES
RADIATION PRESSURE
REFLECTION
RELATIVISTIC PLASMA
RELATIVISTIC RANGE