Effect of Astigmatism on the Tight Focusing of Azimuthally Polarized Lorentz-Gauss Vortex Beam

Effect of astigmatism on the tight focusing properties of azimuthally polarized Lorentz–Gauss vortex beam is investigated numerically by the vector diffraction theory. Thus for non-vortex Lorentz beam the presence of astigmatism largely deform the focal structure and shifted the maximum intensity axially. However for the vortex Lorentz beam axially shifting with slightly deformation is observed. The author expect such a study is important in practical applications such as optical tweezers, laser printing and material processing.