تقرير
Phase delays in $\omega-2\omega$ above-threshold ionization
| العنوان: | Phase delays in $\omega-2\omega$ above-threshold ionization |
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| المؤلفون: | López, S. D., Donsa, S., Nagele, S., Arbó, D. G., Burgdörfer, J. |
| سنة النشر: | 2021 |
| المجموعة: | Physics (Other) |
| مصطلحات موضوعية: | Physics - Atomic Physics |
| الوصف: | Relative phases of atomic above-threshold ionization wavepackets have been investigated in a recent experiment [L. J. Zipp, A. Natan, and P. H. Bucksbaum, Optica \textbf{1}, 361-364 (2014)] exploiting interferences between different pathways in a weak probe field at half the frequency of the strong ionization pulse. In this work we theoretically explore the extraction of phase delays and time delays of attosecond wavepackets formed in strong-field ionization. We perform simulations solving the time-dependent Schr\"odinger equation and compare these results with the strong-field and Coulomb-Volkov approximations. In order to disentangle short- from long- ranged effects of the atomic potential we also perform simulations for atomic model potentials featuring a Yukawa-type short-range potential. We find significant deviations of the \textit{ab-initio} phase delays between different photoelectron pathways from the predictions by the strong-field approximation even at energies well above the ionization threshold. We identify similarities but also profound differences to the well-known interferometric extraction of phase- and time delays in one-photon ionization. Comment: 27 pages, 8 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevA.104.043113 |
| URL الوصول: | http://arxiv.org/abs/2107.12414 |
| رقم الأكسشن: | edsarx.2107.12414 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevA.104.043113 |
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