Laser-assisted Fano resonance: attosecond quantum control and dynamical imaging
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arXiv
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| Autori principali: | , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2023
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| _version_ | 1866910888897806336 |
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| author | Han, Meng Liang, Hao Ji, Jia-bao Sum, Leung Chung Ueda, Kiyoshi Rost, Jan Michael Wörner, Hans Jakob |
| author_facet | Han, Meng Liang, Hao Ji, Jia-bao Sum, Leung Chung Ueda, Kiyoshi Rost, Jan Michael Wörner, Hans Jakob |
| contents | A Fano resonance arises from the pathway interference between discrete and continuum states, playing a fundamental role in many branches of physics, chemistry and material science. Here, we introduce the concept of a laser-assisted Fano resonance, created from two interferometric pathways that are coupled together by an additional laser field, which introduces a controllable phase delay between them and results in a generalized Fano lineshape that can be actively controlled on the {\it attosecond} time scale. Based on our experimental results of unprecedented resolution, we dynamically image a resonant electron wave packet during its evolution directly in the time domain, extracting both the amplitude and the phase, which allows for the measurement of the {\it resonant} photoionization time delay. Ab-initio calculations and simulations employing a physically transparent two-level model agree with our experimental results, laying the groundwork for extending our concepts into attosecond quantum control of complex systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2302_04090 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Laser-assisted Fano resonance: attosecond quantum control and dynamical imaging Han, Meng Liang, Hao Ji, Jia-bao Sum, Leung Chung Ueda, Kiyoshi Rost, Jan Michael Wörner, Hans Jakob Quantum Physics Atomic Physics Optics A Fano resonance arises from the pathway interference between discrete and continuum states, playing a fundamental role in many branches of physics, chemistry and material science. Here, we introduce the concept of a laser-assisted Fano resonance, created from two interferometric pathways that are coupled together by an additional laser field, which introduces a controllable phase delay between them and results in a generalized Fano lineshape that can be actively controlled on the {\it attosecond} time scale. Based on our experimental results of unprecedented resolution, we dynamically image a resonant electron wave packet during its evolution directly in the time domain, extracting both the amplitude and the phase, which allows for the measurement of the {\it resonant} photoionization time delay. Ab-initio calculations and simulations employing a physically transparent two-level model agree with our experimental results, laying the groundwork for extending our concepts into attosecond quantum control of complex systems. |
| title | Laser-assisted Fano resonance: attosecond quantum control and dynamical imaging |
| topic | Quantum Physics Atomic Physics Optics |
| url | https://arxiv.org/abs/2302.04090 |