https://doi.org/10.1051/epjconf/201921502003
Multilevel axicon for perfect optical vortex generation
National Institute for R&D in Microtechnology IMT, Bucharest, 077190, Romania
* Corresponding author: rebeca.tudor@imt.ro
Published online: 10 September 2019
We present the fabrication of a beam shaper with 32 levels for the generation of nondiffractive optical fields representing quasi-Bessel beams of order zero. This optical element is designed for visible light (λ=633 nm) and fabricated using standard photolithography and a fine calibrated reactive ion etching process. A large number of levels approximates a continuous conical surface so that the optical quality of the element is very good. It is investigated the possibility of generating perfect optical vortices with this class of optical elements.
© The Authors, published by EDP Sciences, 2019
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