Propagation properties of radially polarized Pearcey-Gauss vortex beams in free space**Project supported by the National Natural Science Foundation of China (Grant Nos. 11775083 and 11374108) and the National Training Program of Innovation and Entrepreneurship for Undergraduates, China.

Abstract

We investigate a family of radially polarized Pearcey–Gauss vortex beams (RPPGVBs), obtain the general propagation expressions of an RPPGVB, and study the intensity distribution, phase pattern, spin currents as well as the orbital currents when the RPPGVB propagates in free space. The focal plane and the intensity of the focal point can be adjusted by changing the position of the vortex and the scaling factors. We also investigate how the waist size influences the propagation properties.