Quasi-Talbot effect with vortex beams and formation of vortex beamlet arrays

Boris Knyazev, Oleg Kameshkov, Nikolay Vinokurov, Valery Cherkassky, Yulia Choporova, Vladimir Pavelyev

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

We study diffraction of Bessel vortex beams with topological charges of ±1 and ±2 and a wavelength of 130 µm on two-dimensional amplitude periodic gratings. Results of simulations and experiments at the Novosibirsk Free Electron Laser facility show that there appear periodic patterns in the planes corresponding to the classical main and fractional Talbot planes, but instead of self-images of the holes, there are observed periodic lattices of annular vortex microbeams with topological charges corresponding to the charge of the beam illuminating the grating. The ring diameters are the same for beams with different topological charges, but they are proportional to the grating period and inversely proportional to the diameter of the beam illuminating the grating.

Original languageEnglish
Pages (from-to)14174-14185
Number of pages12
JournalOptics Express
Volume26
Issue number11
DOIs
Publication statusPublished - 28 May 2018

Keywords

  • ORBITAL ANGULAR-MOMENTUM
  • DOUBLE-SLIT INTERFERENCE
  • OPTICAL VORTICES
  • GENERATION
  • HOLOGRAPHY

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