Rotating vectorial vortices produced by space-variant subwavelength gratings

Avi Niv, Gabriel Biener, Vladimir Kleiner, Erez Hasman

Research output: Contribution to journalArticlepeer-review

54 Scopus citations

Abstract

A new class of vectorial vortex based on coherent addition of two orthogonal circularly polarized Bessel beams of identical order but with different propagation constants is presented. The transversely space-variant axially symmetric polarization distributions of these vectorial fields rotate as they propagate, while they maintain a propagation-invariant Bessel intensity distribution. These properties were demonstrated by use of discrete space-variant subwavelength gratings for 10.6 μm CO2 laser radiation. The polarization properties were verified by both full space-variant polarization analysis and measurements. Rotating intensity patterns are also demonstrated by transmitting the vectorial vortices through a linear polarizer.

Original languageEnglish
Pages (from-to)2933-2935
Number of pages3
JournalOptics Letters
Volume30
Issue number21
DOIs
StatePublished - 1 Nov 2005
Externally publishedYes

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