| Autor: |
Federico Vismarra, Marina Fernández-Galán, Daniele Mocci, Lorenzo Colaizzi, Víctor Wilfried Segundo, Roberto Boyero-García, Javier Serrano, Enrique Conejero-Jarque, Marta Pini, Lorenzo Mai, Yingxuan Wu, Hans Jakob Wörner, Elisa Appi, Cord L. Arnold, Maurizio Reduzzi, Matteo Lucchini, Julio San Román, Mauro Nisoli, Carlos Hernández-García, Rocío Borrego-Varillas |
| Jazyk: |
angličtina |
| Rok vydání: |
2024 |
| Předmět: |
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| Zdroj: |
Light: Science & Applications, Vol 13, Iss 1, Pp 1-9 (2024) |
| Druh dokumentu: |
article |
| ISSN: |
2047-7538 |
| DOI: |
10.1038/s41377-024-01564-5 |
| Popis: |
Abstract Isolated attosecond pulse (IAP) generation usually involves the use of short-medium gas cells operated at high pressures. In contrast, long-medium schemes at low pressures are commonly perceived as inherently unsuitable for IAP generation due to the nonlinear phenomena that challenge favourable phase-matching conditions. Here we provide clear experimental evidence on the generation of isolated extreme-ultraviolet attosecond pulses in a semi-infinite gas cell, demonstrating the use of extended-medium geometries for effective production of IAPs. To gain a deeper understanding we develop a simulation method for high-order harmonic generation (HHG), which combines nonlinear propagation with macroscopic HHG solving the 3D time-dependent Schrödinger equation at the single-atom level. Our simulations reveal that the nonlinear spatio-temporal reshaping of the driving field, observed in the experiment as a bright plasma channel, acts as a self-regulating mechanism boosting the phase-matching conditions for the generation of IAPs. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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