Vectorial vortex mode transformation for a hollow waveguide using Pancharatnam-Berry phase optical elements

Yaniv Yirmiyahu, Avi Niv, Gabriel Biener, Vladimir Kleiner, Erez Hasman

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

Transformation and inverse transformation between a free-space linearly polarized beam and the vectorial vortex mode of a circular hollow waveguide by use of Pancharatnam-Berry phase optical elements is proposed. Demonstration was achieved by fabricating GaAs subwavelength gratings and utilizing a 300 μm diameter hollow metallic waveguide for 10.6 μm wavelength CO2 laser radiation. The mode transformations and the excitation of a single vectorial mode inside the hollow waveguide were verified by full polarization measurements. In addition, the inverse mode transformation of the single vectorial mode excitation in the waveguide enabled us to experimentally obtain a linearly polarized bright spot with a high central lobe.

Original languageEnglish
Pages (from-to)3252-3254
Number of pages3
JournalOptics Letters
Volume31
Issue number22
DOIs
StatePublished - 15 Nov 2006
Externally publishedYes

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