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Photonics 2017, 4(2), 28;

Generation and Applications of Extreme-Ultraviolet Vortices

Grupo de Investigación en Aplicaciones del Láser y Fotónica, Departamento de Física Aplicada, University of Salamanca, E-37008 Salamanca, Spain
GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
Elettra-Sincrotrone Trieste, Strada Statale 14-km 163,5, Basovizza, 34149 Trieste, Italy
Author to whom correspondence should be addressed.
Received: 9 February 2017 / Revised: 24 March 2017 / Accepted: 25 March 2017 / Published: 7 April 2017
(This article belongs to the Special Issue Extreme UV Lasers: Technologies and Applications)
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Vortex light beams are structures of the electromagnetic field with a spiral phase ramp around a point-phase singularity. These vortices have many applications in the optical regime, ranging from optical trapping and quantum information to spectroscopy and microscopy. The extension of vortices into the extreme-ultraviolet (XUV)/X-ray regime constitutes a significant step forward to bring those applications to the nanometer or even atomic scale. The recent development of a new generation of X-ray sources, and the refinement of other techniques, such as harmonic generation, have boosted the interest of producing vortex beams at short wavelengths. In this manuscript, we review the recent studies in the subject, and we collect the major prospects of this emerging field. We also focus on the unique and promising applications of ultrashort XUV/X-ray vortex pulses. View Full-Text
Keywords: XUV/X-ray vortices; orbital angular momentum of photons; high-harmonic generation; free-electron lasers; plasma physics XUV/X-ray vortices; orbital angular momentum of photons; high-harmonic generation; free-electron lasers; plasma physics

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Hernández-García, C.; Vieira, J.; Mendonça, J.T.; Rego, L.; San Román, J.; Plaja, L.; Ribic, P.R.; Gauthier, D.; Picón, A. Generation and Applications of Extreme-Ultraviolet Vortices. Photonics 2017, 4, 28.

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