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oai:gredos.usal.es:10366/1465882025-04-30T20:35:52Zcom_10366_133237com_10366_4512com_10366_3823col_10366_133238

Hernández García, Carlos Rego Cabezas, Laura San Román Álvarez de Lara, Julio Picón, Antonio Plaja Rustein, Luis 2021-05-31T07:03:28Z 2021-05-31T07:03:28Z 2017 Hernández-García, C., Rego, L., San Román, J., Picón, A., & Plaja, L. (2017). Attosecond twisted beams from high-order harmonic generation driven by optical vortices. High Power Laser Science and Engineering, 5, E3. doi:10.1017/hpl.2017.1 2095-4719 http://hdl.handle.net/10366/146588 10.1017/hpl.2017.1 2052-3289 Optical vortices are structures of the electromagnetic field with a spiral phase ramp about a point-phase singularity, carrying orbital angular momentum (OAM). Recently, OAM has been imprinted to short-wavelength radiation through high-order harmonic generation (HHG), leading to the emission of attosecond twisted beams in the extreme-ultraviolet (XUV) regime. We explore the details of the mapping of the driving vortex to its harmonic spectrum. In particular, we show that the geometry of the harmonic vortices is convoluted, arising from the superposition of the contribution from the short and long quantum paths responsible of HHG. Finally, we show how to take advantage of transverse phase-matching to select twisted attosecond beams with different spatiotemporal properties. eng http://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess Attribution-NonCommercial-NoDerivatives 4.0 Internacional attosecond science s extreme-ultraviolet vortices High harmonic generation orbital angular momentum twisted beams vortex beams Attosecond twisted beams from high-order harmonic generation driven by optical vortices info:eu-repo/semantics/article