Focusing of Cylindrical Vector Beams and Their Modifications
摘要
In recent years, high-order vector light fields, whose linear polarization vector varies across the beam cross section, have been at the focus of research In this section, we derive the Poincare-Hopf and Stokes indices η and σ for nth-order cylindrical vector beams. We show that in the source plane of the beams (where the on-axis field component is zero),