Laser fabrication of diffractive optical elements based on detour-phase computer-generated holograms for two-dimensional Airy beams

Appl Opt. 2018 Feb 20;57(6):1367-1372. doi: 10.1364/AO.57.001367.

Abstract

We have designed, fabricated, and tested an amplitude diffractive optical element for generation of two-dimensional (2D) Airy beams. The design is based on a detour-phase computer-generated hologram. Using laser ablation of metallic films, we obtained a 2 mm×2 mm diffractive optical element with a pixel of 5 μm×5 μm and demonstrated a fast, cheap, and reliable fabrication process. This device can modulate 2D Airy beams or it can be used as a UV lithography mask to fabricate a series of phase holograms for higher energy efficiency. Tests according to the premise and an analysis of the transverse profile and propagation are presented.