dc.contributor.author | Taoutioui, Abdelmalek | |
dc.contributor.author | Agueny, Hicham | |
dc.date.accessioned | 2022-03-16T13:47:41Z | |
dc.date.available | 2022-03-16T13:47:41Z | |
dc.date.created | 2022-01-26T08:56:08Z | |
dc.date.issued | 2021 | |
dc.identifier.issn | 2072-666X | |
dc.identifier.uri | https://hdl.handle.net/11250/2985609 | |
dc.description.abstract | High-order harmonic generation is a nonlinear process that converts the gained energy during light-matter interaction into high-frequency radiation, thus resulting in the generation of coherent attosecond pulses in the XUV and soft x-ray regions. Here, we propose a control scheme for enhancing the efficiency of HHG process induced by an intense near-infrared (NIR) multi-cycle laser pulse. The scheme is based on introducing an infrared (IR) single-cycle pulse and exploiting its characteristic feature that manifests by a non-zero displacement effect to generate high-photon energy. The proposed scenario is numerically implemented on the basis of the time-dependent Schrödinger equation. In particular, we show that the combined pulses allow one to produce high-energy plateaus and that the harmonic cutoff is extended by a factor of 3 compared to the case with the NIR pulse alone. The emerged high-energy plateaus is understood as a result of a vast momentum transfer from the single-cycle field to the ionized electrons while travelling in the NIR field, thus leading to high-momentum electron recollisions. We also identify the role of the IR single-cycle field for controlling the directionality of the emitted electrons via the IR-field induced electron displacement effect. We further show that the emerged plateaus can be controlled by varying the relative carrier-envelope phase between the two pulses as well as the wavelengths. Our findings pave the way for an efficient control of light-matter interaction with the use of assisting femtosecond single-cycle fields. | en_US |
dc.language.iso | eng | en_US |
dc.publisher | MDPI | en_US |
dc.rights | Navngivelse 4.0 Internasjonal | * |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/deed.no | * |
dc.title | Femtosecond Single Cycle Pulses Enhanced the Efficiency of High Order Harmonic Generation | en_US |
dc.type | Journal article | en_US |
dc.type | Peer reviewed | en_US |
dc.description.version | publishedVersion | en_US |
dc.rights.holder | Copyright 2021 by the authors | en_US |
dc.source.articlenumber | 610 | en_US |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 1 | |
dc.identifier.doi | 10.3390/mi12060610 | |
dc.identifier.cristin | 1990058 | |
dc.source.journal | Micromachines | en_US |
dc.identifier.citation | Micromachines. 2021, 12 (6), 610. | en_US |
dc.source.volume | 12 | en_US |
dc.source.issue | 6 | en_US |