Fig. 4From: Properties of a Tightly Focused Circularly Polarized Anomalous Vortex Beam and Its Optical Forces on Trapped NanoparticlesPhase profile of the longitudinal component of CPAVBs with m = 4 near the focus. The first and second rows are the left-hand and right-hand CPAVBs, respectively. a-1 to a-2 z = − 0.005zr. b-1 to b-2 z = 0. c-1 to c-2 z = 0.005zrBack to article page