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- W2792043088 abstract "Abstract Effects of external static magnetic field (applied in $hat y$ -direction) on resonant excitation of surface plasma waves (SPW) have been investigated over the metal free space interface. The high power laser $({rm omega} _0,;vec k_{0z})$ is incident over the metal surface and exerts a ponderomotive force on the metal electrons in the skin layer. The ponderomotive force disturbs the quasi-neutrality of plasma which results into the excitation of space charge field at the frequency 2ω 0 . The electron density perturbation at frequency 2ω 0 driven by self-consistent space charge potential couples with the oscillatory velocity due to the seed SPW $({rm omega}, ;vec k_z)$ and produces nonlinear current to drive another counter propagating SPW $({rm omega} _1,;vec k_{1z})$ at the phase matching conditions of frequency ω = ω 1 − 2ω 0 and wavenumber $vec k_z = vec k_{1z} - 2vec k{}_{0z}$ (by feedback mechanism). The parametric process becomes resonant at 2ω 0 ≈ ω p and the maximum growth rate is achieved for an incidence angle of laser θ = 40°. The growth rate of the process reduces to half on increasing the magnetic field from 0.49 to 2.45 MG. The present study may be significant to the laser absorption experiments where surface rippling can strongly affect the laser energy absorption." @default.
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- W2792043088 date "2018-02-05" @default.
- W2792043088 modified "2023-10-16" @default.
- W2792043088 title "Parametric excitation of surface plasma waves over a metallic surface by laser in an external magnetic field" @default.
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- W2792043088 doi "https://doi.org/10.1017/s0263034617000933" @default.
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