Orbital angular momentum density and spiral spectra of Lorentz–Gauss vortex beams passing through a single slit
Ji Zhi-Yue, Zhou Guo-Quan †
       

(color online) The orbital angular momentum density distribution of the diffracted Lorentz–Gauss vortex beam with w0x = w0y = 1 mm, M = 1: (a) w0 = 1 mm, (b) w0 = 2 mm, (c) w0 = 5 mm.