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oai:gredos.usal.es:10366/1471922025-04-30T20:35:10Zcom_10366_133237com_10366_4512com_10366_3823col_10366_133238

Dorney, Kevin M. Rego Cabezas, Laura Brooks, Nathan J. San Román Álvarez de Lara, Julio Liao, Chen-Ting Ellis, Jennifer L. Zusin, Dmitriy Gentry, Christian Nguyen, Quynh L. Shaw, Justin M. Picón, Antonio Plaja Rustein, Luis Kapteyn, Henry C. Murnane, Margaret M. Hernández García, Carlos 2021-10-01T09:10:40Z 2021-10-01T09:10:40Z 2019-02 Dorney, K.M., Rego, L., Brooks, N.J. et al. (2019). Controlling the polarization and vortex charge of attosecond high-harmonic beams via simultaneous spin–orbit momentum conservation. Nature Photon 13, 123–130. https://doi.org/10.1038/s41566-018-0304-3 1749-4885 http://hdl.handle.net/10366/147192 10.1038/s41566-018-0304-3 1749-4893 [EN]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. The authors are thankful for useful and productive conversations with E. Pisanty, C. Durfee, D. Hickstein, S. Alperin and M. Siemens. H.C.K. and M.M.M. graciously acknowledge support from the Department of Energy BES Award No. DE-FG02–99ER14982 for the experimental implementation, as well as a MURI grant from the Air Force Office of Scientific Research under Award No. FA9550–16–1–0121 for the theory. J.L.E., N.J.B. and Q.L.N. acknowledge support from National Science Foundation Graduate Research Fellowships (Grant No. DGE-1144083). C.H.-G., J.S.R. and L.P. acknowledge support from Junta de Castilla y León (SA046U16) and Ministerio de Economía y Competitividad (FIS2013–44174-P, FIS2016–75652-P). C.H.-G. acknowledges support from a 2017 Leonardo Grant for Researchers and Cultural Creators, BBVA Foundation. L.R. acknowledges support from Ministerio de Educación, Cultura y Deporte (FPU16/02591). A.P. acknowledges support from the Marie Sklodowska-Curie Grant, Agreement No. 702565. We thankfully acknowledge the computer resources at MareNostrum and the technical support provided by Barcelona Supercomputing Center (RES-AECT-2014–2–0085). This research made use of the high-performance computingresources of the Castilla y León Supercomputing Center (SCAYLE, www.scayle.es),financed by the European Regional Development Fund (ERDF). Certain commercial instruments are identified to specify the experimental study adequately. This does not imply endorsement by the National Institute of Standards and Technology (NIST) or that the instruments are the best available for the purpose. application/pdf eng High-harmonic generation Nonlinear optics Ultrafast lasers Ultrafast photonics Controlling the polarization and vortex charge of attosecond high-harmonic beams via simultaneous spin–orbit momentum conservation info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion https://doi.org/10.1038/s41566-018-0304-3 Department of Energy BES Award No. DE-FG02–99ER14982 Air Force Office of Scientific Research under Award No. FA9550–16–1–0121 National Science Foundation Graduate Research Fellowships (Grant No. DGE-1144083) Junta de Castilla y León (SA046U16) Ministerio de Economía y Competitividad (FIS2013–44174-P, FIS2016–75652-P) 2017 Leonardo Grant for Researchers and Cultural Creators, BBVA Foundation Ministerio de Educación, Cultura y Deporte (FPU16/02591) Marie Sklodowska-Curie Grant, Agreement No. 702565 info:eu-repo/semantics/openAccess Nature Photonics 13 2 123 130