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Nonlinear transformation of the linearly polarized plane electromagnetic source wave (with wavenumber and angular frequency omega0) in suddenly created cold plasma is considered using the third-order perturbation technique. The efficiency of the generation of stationary magnetic field mode (k=3k0, omega=0) and traveling transverse wave modes (k=3k0, omega=3omega1=3radic(omega0 2+omegap 2)) is compared with the corresponding modes (k=k0, omega=omega1 and k=k0, omega=0) obtained in linear theory. It is shown that the third-harmonic field components could have respectable values for the specific values of source wave frequencies.
Date of Publication: Aug. 2007