Propagation-invariant hollow beams with hexagonal symmetry

Based on the interference of six symmetric beams, we introduce a new way to produce propagation-invariant hollow beams with hexagonal symmetry. The hollow beams have a dark center and hexagonal shape. They can be optical vortices, radially or azimuthally polarized beams. The results of simulation demonstrate the feasibility of this method.

Research Highlights
► We proposed a method to produce hollow beams with hexagonal array.
► The hollow beams have the characteristic of propagation invariance.
► The hollow beams can be optical vortices, radially, azimuthally polarized beams.
► It can be used to study the characteristics of hollow beams array in medium.