Quantum-path signatures in attosecond helical beams driven by optical vortices
High-order harmonic generation (HHG) driven by beams carrying orbital angular momentum has been recently demonstrated as a unique process to generate spatio-temporal coherent extreme ultraviolet (XUV)/x-ray radiation with attosecond helical structure. We explore the details of the mapping of the dri...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2015-01-01
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| Series: | New Journal of Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1367-2630/17/9/093029 |
| _version_ | 1797751119685877760 |
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| author | C Hernández-García J San Román L Plaja A Picón |
| author_facet | C Hernández-García J San Román L Plaja A Picón |
| author_sort | C Hernández-García |
| collection | DOAJ |
| description | High-order harmonic generation (HHG) driven by beams carrying orbital angular momentum has been recently demonstrated as a unique process to generate spatio-temporal coherent extreme ultraviolet (XUV)/x-ray radiation with attosecond helical structure. 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 complex, arising from the superposition of the contribution from the short and long quantum paths responsible of HHG. Transversal phase-matching and quantum path interferences provide an explanation of the dramatic changes in the XUV vortex structure generated at different relative positions of the target respect to the laser beam focus. Finally, we show how to take advantage of transversal phase-matching to select helical attosecond beams generated from short or long quantum paths, exhibiting positive or negative temporal chirp respectively. |
| first_indexed | 2024-03-12T16:42:48Z |
| format | Article |
| id | doaj.art-b61592abf7184b31959985ff910debc4 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:42:48Z |
| publishDate | 2015-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-b61592abf7184b31959985ff910debc42023-08-08T14:22:25ZengIOP PublishingNew Journal of Physics1367-26302015-01-0117909302910.1088/1367-2630/17/9/093029Quantum-path signatures in attosecond helical beams driven by optical vorticesC Hernández-García0J San Román1L Plaja2A Picón3Grupo de Investigación en Óptica Extrema, Universidad de Salamanca , E-37008, Salamanca, Spain; JILA, University of Colorado at Boulder , Boulder, CO 80309-0440, USAGrupo de Investigación en Óptica Extrema, Universidad de Salamanca , E-37008, Salamanca, SpainGrupo de Investigación en Óptica Extrema, Universidad de Salamanca , E-37008, Salamanca, SpainArgonne National Laboratory, Argonne, IL 60439, USAHigh-order harmonic generation (HHG) driven by beams carrying orbital angular momentum has been recently demonstrated as a unique process to generate spatio-temporal coherent extreme ultraviolet (XUV)/x-ray radiation with attosecond helical structure. 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 complex, arising from the superposition of the contribution from the short and long quantum paths responsible of HHG. Transversal phase-matching and quantum path interferences provide an explanation of the dramatic changes in the XUV vortex structure generated at different relative positions of the target respect to the laser beam focus. Finally, we show how to take advantage of transversal phase-matching to select helical attosecond beams generated from short or long quantum paths, exhibiting positive or negative temporal chirp respectively.https://doi.org/10.1088/1367-2630/17/9/093029helical attosecond beamsorbital angular momentumhigh-order harmonic generation42.50.Tx42.65.Ky32.30Rj |
| spellingShingle | C Hernández-García J San Román L Plaja A Picón Quantum-path signatures in attosecond helical beams driven by optical vortices New Journal of Physics helical attosecond beams orbital angular momentum high-order harmonic generation 42.50.Tx 42.65.Ky 32.30Rj |
| title | Quantum-path signatures in attosecond helical beams driven by optical vortices |
| title_full | Quantum-path signatures in attosecond helical beams driven by optical vortices |
| title_fullStr | Quantum-path signatures in attosecond helical beams driven by optical vortices |
| title_full_unstemmed | Quantum-path signatures in attosecond helical beams driven by optical vortices |
| title_short | Quantum-path signatures in attosecond helical beams driven by optical vortices |
| title_sort | quantum path signatures in attosecond helical beams driven by optical vortices |
| topic | helical attosecond beams orbital angular momentum high-order harmonic generation 42.50.Tx 42.65.Ky 32.30Rj |
| url | https://doi.org/10.1088/1367-2630/17/9/093029 |
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