Study on the propagation properties of power exponential Airy vortex beams in inhomogeneous plasma

This study investigates the propagation characteristics of power exponential Airy vortex beams in inhomogeneous plasma by using the wind velocity drift effect in plasma and the phase-screen model of space plasma. It compares the intensity and phase changes of power exponential Airy vortex beams passing through different media and calculates the orbital angular momentum spectrum distribution and transmission coefficient of the beams with different propagation distances and electron densities. The calculation results show that the model can reflect the phase delay, intensity attenuation, and wavefront distortion of Airy vortex beams during plasma propagation. At the same time, the model takes into account the nonlinear effect of self-focusing in the interaction between high-power laser and plasma. Specifically, it analyzes the changes in the radius, intensity, and centroid trajectory of Airy vortex beams under the nonlinear effect. Results show that the nonlinear phase accumulation interaction between the plasma and Airy vortex beams leads to the gradual decrease in the beam radius, the shift of the centroid trajectory, and the effects of self-focusing and self-defocusing. This study provides a new idea for the problem of “black barrier” in the plasmon sheath.