Tunable Orbital Angular Momentum Beams in the Extreme Ultraviolet/soft X-ray Regimes

Turpin, A. , Rego, L., San Román, J., Picón, A., Plaja, L. and Hernández-García, C. (2017) Tunable Orbital Angular Momentum Beams in the Extreme Ultraviolet/soft X-ray Regimes. In: SPIE Optics + Optoelectronics: Metamaterials XI, Prague, Czech Republic, 24-27 Apr 2017, 102430V. ISBN 9781510609877 (doi: 10.1117/12.2265811)

Abstract

High-order harmonic generation (HHG) has been recently proven to produce harmonic vortices carrying orbital angular momentum (OAM) in the extreme-ultraviolet (XUV) region from the nonlinear up-conversion of infrared vortex beams. In this work we present two methods to control and extend the OAM content of the harmonic vortices. First, we show that when a driver combination of different vortex modes is used, HHG leads to the production of harmonic vortices with a broad OAM content due to its nonperturbative nature. Second, we show that harmonic vortices with two discrete OAM contributions –so called fractional OAM modes– are generated when HHG is driven by conical refraction beams. Our work offers the possibility of generating tunable OAM beams in the XUV regime, potentially extensible to the soft x rays, overcoming the state of the art limitations for the generation of OAM beams far from the visible domain.

• Item Type: Conference Proceedings
• Additional Information: Proceedings Volume 10243, X-ray Lasers and Coherent X-ray Sources: Development and Applications; 102430V.
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Turpin, Dr Alejandro
• Authors: Turpin, A., Rego, L., San Román, J., Picón, A., Plaja, L., and Hernández-García, C.
• College/School: College of Science and Engineering > School of Computing Science
• Journal Name: X-ray Lasers and Coherent X-ray Sources: Development and Applications
• ISSN: 0277-786X
• ISBN: 9781510609877
• Published Online: 17 May 2017
• Copyright Holders: Copyright © 2017 SPIE
• First Published: First published in Proceedings of SPIE 10243: 102430V
• Publisher Policy: Reproduced in accordance with the publisher copyright policy