Harmonic Generation in Optical Vortex Fields
In this work the interaction of a thin medium of neon gas localized in the focal region of sharply and loosely focused Gaussian, radially, and azimuthally polarized elds is investigated. The distribution of elds in the focal plane is described using the Richards-Wolf theory, taking into account the presence of three spatial eld components in the solution. The generated harmonics are investigated from the point of view of the intensity and polarization state described within the framework of the 3D Stokes parameters formalism. The results are studied in dependence on the distance from the focal plane to the detector, as well as their distribution in the plane perpendicular to the optical axis. The e ciency of harmonic generation in di erent spatial modes is investigated, as well as the topology of the spatial distribution of individual harmonics in the plane perpendicular to the optical axis.