  The dewetting of an azopolymer droplet, followed by the photostructuration of
the evaporated droplet, is employed to create an amplitude mask. This
straightforward process yields a large area featuring periodic micro- and
nanostructures. The resulting pattern is utilized to generate a nondiffracting
beam. Starting with a Gaussian beam illuminating the amplitude mask, the
critical aspect is the production of a bright, ring-shaped beam with a high
radius-to-width ratio and symmetric central laser spots, each with the same
intensity. This alternative approach to shaping a laser beam is demonstrated as
a rapid and cost-effective fabrication technique.
