1.
Opt Lett
; 48(20): 5419-5422, 2023 Oct 15.
Artigo
em Inglês
| MEDLINE
| ID: mdl-37831882
RESUMO
We propose what we believe to be a new kind of diffractive phase element, i.e., vortex phase plate (VPP) with phase singularities along the azimuth direction. Phase function of the proposed VPP is given analytically. Axial intensity oscillations of propagating Bessel beams are ideally suppressed by using the proposed VPP. Compared with the traditional amplitude mask, the proposed VPP takes such advantages as a simpler fabrication procedure and a lower cost.