Magnetic spectral Stokes singularities of stochastic electromagnetic beams and comparison with electric spectral Stokes singularities

摘要

Taking the Gaussian-Schell model vortex beam as an example, the free-space propagation of magnetic spectral Stokes singularities of stochastic electromagnetic beams in the paraxial approximation is studied and compared with the corresponding electric spectral Stokes singularities. It is shown that there exist magnetic spectral Stokes singularities of stochastic electromagnetic beams. By varying the spatial correlation length or propagation distance, the motion, creation, and annihilation of magnetic spectral Stokes singularities, the V point and handedness reversal of C point will take place. In comparison with the electric spectral Stokes singularities of stochastic electromagnetic beams, their positions are not the same, and the left- and right-handedness spaces do not coincide.