Spiral phase elements obtained by use of discrete space-variant subwavelength gratings

Avi Niv, Gabriel Biener, Vladimir Kleiner, Erez Hasman

Research output: Contribution to journalArticlepeer-review

61 Scopus citations

Abstract

The formation of spiral phase elements producing helical beams with different topological charges is presented. The elements consist of discrete space-variant subwavelength dielectric gratings. We demonstrate our approach by fabricating elements for circularly polarized laser radiation with a wavelength of 10.6 μm. The resulting helical phases, as well as the birefrigent parameters of the element, are measured by analyzing the polarization-dependency of the elements along with the self-interference characteristics of the emerging beams.

Original languageEnglish
Pages (from-to)306-314
Number of pages9
JournalOptics Communications
Volume251
Issue number4-6
DOIs
StatePublished - 15 Jul 2005
Externally publishedYes

Keywords

  • Helical phase
  • Optical vortex
  • Singular optics
  • Space-variant grating
  • Spiral element
  • Subwavelength grating

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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