Relativistic Propagation of Linearly/Circularly Polarized Laser Radiation in Plasmas

Figure 6

(a) Variation of beamwidth parameter (𝑓) with dimensionless distance of propagation (𝜉) for linearly (solid line) and circularly (dot line) polarized beams. Curves (I, 𝐷_0.7) correspond to (𝜔_𝑝/𝜔)²=0.7(1+2.5𝜉), 𝜌₀=4, and (𝑃_cr2/𝑃_cr1)=113.22 (for linearly polarized laser beam) and 113.21 (for circularly polarized laser beam), and curves (II, 𝐷_1.2) correspond to (𝜔_𝑝/𝜔)²=1.2(1+2.5𝜉), 𝜌₀=3, and (𝑃_cr2/𝑃_cr1)=99.067 (for linearly polarized laser beam) and 64.89 (for circularly polarized laser beam). (b) Variation of dimensionless axial intensity (𝑞₀/𝑓²) with dimensionless distance of propagation (𝜉) for linearly (solid line) and circularly (dot line) polarized beams. Curves (I, 𝐷_0.7) correspond to (𝜔_𝑝/𝜔)²=0.7(1+2.5𝜉), 𝜌₀=4, and (𝑃_cr2/𝑃_cr1)=113.22 (for linearly polarized laser beam) and 113.21 (for circularly polarized laser beam) and curves (II, 𝐷_1.2) correspond to (𝜔_𝑝/𝜔)²=1.2(1+2.5𝜉), 𝜌₀=3, and (𝑃_cr2/𝑃_cr1)=99.067 (for linearly polarized laser beam) and 64.89 (for circularly polarized laser beam).

(a)

(b)