Figure 3
From: Intense vortical-field generation using coherent superposition of multiple vortex beams
(a) Intensity distribution of high-intensity local spots of the combined field at the beam-waist plane, where the field of the other positions is filtered out. (b) The isosurface distribution of the high-intensity local spots of the combined field within the Rayleigh distance, where the isosurface value is \({I}_{\mathrm{max}}\)·exp(− 2), and \({I}_{\mathrm{max}}\) is the peak intensity of the combined field.
