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Polar POLICRYPS diffractive structures generate cylindrical vector beams

Journal article
Authors Domenico Alj
Sathyanarayana Paladugu
Giovanni Volpe
Roberto Caputo
Cesare Umeton
Published in Applied Physics Letters
Volume 107
ISSN 00036951
Publication year 2015
Published at
Language en
Subject categories Physical Sciences

Abstract

© 2015 AIP Publishing LLC. Local shaping of the polarization state of a light beam is appealing for a number of applications. This can be achieved by employing devices containing birefringent materials. In this article, we present one such enables converting a uniformly circularly polarized beam into a cylindrical vector beam (CVB). This device has been fabricated by exploiting the POLICRYPS (POlymer-LIquid CRYstals-Polymer-Slices) photocuring technique. It is a liquid-crystal-based optical diffraction grating featuring polar symmetry of the director alignment. We have characterized the resulting CVB profile and polarization for the cases of left and right circularly polarized incoming beams.

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