(Color online). Time evolution of the electromagnetic wave intensity registered in two locations: inside the plasma at the first cavity location (red, 7 from the plasma edge), and in the vacuum in front of the plasma (blue). The distance between the two probes is . The five red pulses evolve into the adjacent blue pulses upon traversing the plasma–vacuum boundary. Cavitation sets in just after the last time shown here at .
(Color online). Spectra of the transverse (red) and longitudinal (blue) electric fields inside the plasma at the location of the cavity. Visible also the second harmonic (3) of the longitudinal field at . The spectra were integrated over the time window from to . Note that for visibility the longitudinal field has been scaled up by a factor of 10.
(Color online). Fourier spectra of the longitudinal (a) and transverse (b) fields during the SRS-type instability. The longitudinal field is taken at (blue) and (red). The transverse field is taken at (blue) and (red). The peaks 1 and 2 correspond to the laser field in vacuum and in the plasma ( for ), respectively. Cavitation sets in at and terminates at . The spectra are integrated over the whole simulation box comprising the plasma plateau and the surrounding vacuum regions.
Spectrum of the transverse electromagnetic field integrated over the time interval of cavitation . The frequency evolves from the value of the local plasma frequency (see Fig. 2) to its final value of .
(Color online). The soliton configuration at the time from the simulation (a) and the analytical model (b). Shown are density (blue), the transverse electric field intensity (red), and the magnetic field intensity (green).
Article metrics loading...
Full text loading...