Achromatic vector vortex beams from a glass cone

Radwell, N., Hawley, R.D., Götte, J.B. and Franke-Arnold, S. (2016) Achromatic vector vortex beams from a glass cone. Nature Communications, 7, 10564. (doi: 10.1038/ncomms10564) (PMID:26861191) (PMCID:PMC4749967)

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The reflection of light is governed by the laws first described by Augustin-Jean Fresnel: on internal reflection, light acquires a phase shift, which depends on its polarization direction with respect to the plane of incidence. For a conical reflector, the cylindrical symmetry is echoed in an angular variation of this phase shift, allowing us to create light modes with phase and polarization singularities. Here we observe the phase and polarization profiles of light that is back reflected from a solid glass cone and, in the case of circular input light, discover that not only does the beam contain orbital angular momentum but can trivially be converted to a radially polarized beam. Importantly, the Fresnel coefficients are reasonably stable across the visible spectrum, which we demonstrate by measuring white light polarization profiles. This discovery provides a highly cost-effective technique for the generation of broadband orbital angular momentum and radially polarized beams.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Radwell, Dr Neal and Goette, Dr Joerg and Franke-Arnold, Professor Sonja and Hawley, Mr Ryan
Authors: Radwell, N., Hawley, R.D., Götte, J.B., and Franke-Arnold, S.
College/School:College of Science and Engineering > School of Physics and Astronomy
Research Group:Optics
Journal Name:Nature Communications
Publisher:Nature Publishing Group
Copyright Holders:Copyright © 2016 The Authors
First Published:First published in Nature Communications 7:10564
Publisher Policy:Reproduced under a Creative Commons License
Data DOI:10.5525/gla.researchdata.243

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
637131Quantum memory and processing of orbital angular momentum information in atomic gassesSonja Franke-ArnoldLeverhulme Trust (LEVERHULME)RPG-2013-386S&E P&A - PHYSICS & ASTRONOMY