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Controlling the polarization and vortex charge of attosecond high-harmonic beams via simultaneous spin–orbit momentum conservation

TitleControlling the polarization and vortex charge of attosecond high-harmonic beams via simultaneous spin–orbit momentum conservation
Publication TypeJournal Article
Year of Publication2018
AuthorsDorney, KM, Rego, L, Brooks, NJ, San Román, J, Liao, C-T, Ellis, JL, Zusin, D, Gentry, C, Nguyen, QL, Shaw, JM, Picón, A, Plaja, L, Kapteyn, HC, Murnane, MM, Hernández-García, C
JournalNature Photonics
Date Published2018-12
ISSN1749-4885
Keywordsattosecond pulses, high-harmonic generation
Abstract

Optical interactions are governed by both spin and angular momentum conservation laws, which serve as a tool for controlling light–matter interactions or elucidating electron dynamics and structure of complex systems. Here, we uncover a form of simultaneous spin and orbital angular momentum conservation and show, theoretically and experimentally, that this phenomenon allows for unprecedented control over the divergence and polarization of extreme-ultraviolet vortex beams. High harmonics with spin and orbital angular momenta are produced, opening a novel regime of angular momentum conservation that allows for manipulation of the polarization of attosecond pulses—from linear to circular—and for the generation of circularly polarized vortices with tailored orbital angular momentum, including harmonic vortices with the same topological charge as the driving laser beam. Our work paves the way to ultrafast studies of chiral systems using high-harmonic beams with designer spin and orbital angular momentum.

URLhttps://www.nature.com/articles/s41566-018-0304-3#Abs1
DOI10.1038/s41566-018-0304-3

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