Fig. 1. Schematic of the nonuniform polarization of vector light with a Gaussian intensity profile.

Fig. 2. Illustration of the wave vector matching relation of an x-polarized pump in SRSS and the plasma density profile. The scattered light is indicated by subscript s and magenta color, the pump light by subscript 0 and green color, and the plasma wave by subscript p and orange color.

Fig. 3. Electrostatic energy ∫|E_y(y, z)|²dz in the y–z(n₀) plane, integrated over the longitudinal (z) direction at different times in case 1.

Fig. 4. Results for case 1 in the y–z(n₀) plane, with x representing the direction of laser polarization perpendicular to the y–z plane shown here. SRSS occurs in the y–z plane, while SRBS occurs in the z direction. The frequency spectrum in k-space of the electrostatic field E_z(k_y, k_z), the electrostatic field E_z(y, z), and the magnetic field of the scattered light of SRSS B_z(y, z) are plotted at times 180 T [(a)–(c)], 300 T [(d)–(f)], and 380 T [(g)–(i)].

Fig. 5. Results for case 2. The frequency spectra in k-space of the electrostatic field E_z are depicted in the k_z–k_x plane [(a) and (b)] and the k_z–k_y plane [(c) and (d)], the electrostatic field distributions E_z are shown in the x–z(n₀) plane [(e) and (f)] and the y–z(n₀) plane [(g) and (h)], and the magnetic field distributions of the scattered light of SRSS B_z are plotted in the x–z(n₀) plane [(j) and (k)] and the y–z(n₀) plane [(l) and (m)], at times 200 T and 360 T, respectively.

Fig. 6. Electrostatic energy ∫|E_z(y, z)|²dz in the y–z plane (perpendicular to the laser electric field), integrated over the longitudinal (z) direction at different times.

Fig. 7. Comparison of the intensity distribution of the pump in case 1 (linearly polarized Gaussian light) and case 2 (vector light).