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| Auteurs principaux: | , , , , , , , |
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| Format: | Preprint |
| Publié: |
2024
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| Sujets: | |
| Accès en ligne: | https://arxiv.org/abs/2402.15225 |
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| _version_ | 1866909118253498368 |
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| author | Heras, Alba de las Schmidt, David Román, Julio San Serrano, Javier Adams, Daniel Plaja, Luis Durfee, Charles G. Hernández-García, Carlos |
| author_facet | Heras, Alba de las Schmidt, David Román, Julio San Serrano, Javier Adams, Daniel Plaja, Luis Durfee, Charles G. Hernández-García, Carlos |
| contents | The landscape of ultrafast structured light pulses has recently evolved driven by the capability of high-order harmonic generation (HHG) to up-convert orbital angular momentum (OAM) from the infrared to the extreme-ultraviolet (EUV) spectral regime. Accordingly, HHG has been proven to produce EUV vortex pulses at the femtosecond timescale. Here we demonstrate the generation of attosecond vortex pulse trains, i.e. a succession of attosecond pulses with a helical wavefront, resulting from the synthesis of a comb of EUV high-order harmonics with the same OAM. By driving HHG with a polarization tilt-angle fork grating, two spatially separated circularly polarized high-order harmonic beams with order-independent OAM are created. Our work opens the route towards attosecond-resolved OAM light-matter interactions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_15225 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Attosecond vortex pulse trains Heras, Alba de las Schmidt, David Román, Julio San Serrano, Javier Adams, Daniel Plaja, Luis Durfee, Charles G. Hernández-García, Carlos Optics The landscape of ultrafast structured light pulses has recently evolved driven by the capability of high-order harmonic generation (HHG) to up-convert orbital angular momentum (OAM) from the infrared to the extreme-ultraviolet (EUV) spectral regime. Accordingly, HHG has been proven to produce EUV vortex pulses at the femtosecond timescale. Here we demonstrate the generation of attosecond vortex pulse trains, i.e. a succession of attosecond pulses with a helical wavefront, resulting from the synthesis of a comb of EUV high-order harmonics with the same OAM. By driving HHG with a polarization tilt-angle fork grating, two spatially separated circularly polarized high-order harmonic beams with order-independent OAM are created. Our work opens the route towards attosecond-resolved OAM light-matter interactions. |
| title | Attosecond vortex pulse trains |
| topic | Optics |
| url | https://arxiv.org/abs/2402.15225 |