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| Autori principali: | , , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2023
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| Soggetti: | |
| Accesso online: | https://arxiv.org/abs/2310.04210 |
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| _version_ | 1866912121272401920 |
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| author | Zhao, Jing Bai, Guangru Zhang, Qian Zhang, Bin Tao, Wenkai Qiu, Qianyu Lei, Hongbin Lang, Yue Liu, Jinlei Wang, Xiaowei Zhao, Zengxiu |
| author_facet | Zhao, Jing Bai, Guangru Zhang, Qian Zhang, Bin Tao, Wenkai Qiu, Qianyu Lei, Hongbin Lang, Yue Liu, Jinlei Wang, Xiaowei Zhao, Zengxiu |
| contents | Attosecond transient absorption spectroscopy (ATAS) is becoming an indispensable and powerful tool in the emerging field of attochemistry, while the interpretation of measurements often requires full considerations of the coupling among various freedoms of motion. Here we develop the ionization-coupling model to incorporate the transient absorption and explore the coupled electronic-vibrational dynamics of nitrogen ions induced by strong-field ionization (SFI), which has been investigated in the recent transient x-ray K-edge absorption experiment [PRL 129, 123002 (2022)]. It is found the coherent vibrational wave packet on the involved electronic state is created with broad distribution of vibrational levels which leads to the spectral overlap on the K-edge absorption. By identifying the contributions of each electronic state, the study provides a different interpretation revealing the significant role of the excited state $A^2Π_u$ arising from the electronic-vibrational coupling in strong laser fields. We uncover new features of absorption from forbidden transitions during the laser pulse and confirm the vibronic coherence induced modulations of absorbance after SFI. A new scheme is proposed to avoid the spectral overlap and determine the population among the states which is crucial to resolve the debate on nitrogen air lasing. The work lays down the framework to research the ionic coherence in ATAS and offers valuable insights into the intricate interplay between electronic and vibrational dynamics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2310_04210 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Electronic-vibrational dynamics and coherence in x-ray transient absorption of N2+ induced by strong-field ionization Zhao, Jing Bai, Guangru Zhang, Qian Zhang, Bin Tao, Wenkai Qiu, Qianyu Lei, Hongbin Lang, Yue Liu, Jinlei Wang, Xiaowei Zhao, Zengxiu Optics Atomic Physics Attosecond transient absorption spectroscopy (ATAS) is becoming an indispensable and powerful tool in the emerging field of attochemistry, while the interpretation of measurements often requires full considerations of the coupling among various freedoms of motion. Here we develop the ionization-coupling model to incorporate the transient absorption and explore the coupled electronic-vibrational dynamics of nitrogen ions induced by strong-field ionization (SFI), which has been investigated in the recent transient x-ray K-edge absorption experiment [PRL 129, 123002 (2022)]. It is found the coherent vibrational wave packet on the involved electronic state is created with broad distribution of vibrational levels which leads to the spectral overlap on the K-edge absorption. By identifying the contributions of each electronic state, the study provides a different interpretation revealing the significant role of the excited state $A^2Π_u$ arising from the electronic-vibrational coupling in strong laser fields. We uncover new features of absorption from forbidden transitions during the laser pulse and confirm the vibronic coherence induced modulations of absorbance after SFI. A new scheme is proposed to avoid the spectral overlap and determine the population among the states which is crucial to resolve the debate on nitrogen air lasing. The work lays down the framework to research the ionic coherence in ATAS and offers valuable insights into the intricate interplay between electronic and vibrational dynamics. |
| title | Electronic-vibrational dynamics and coherence in x-ray transient absorption of N2+ induced by strong-field ionization |
| topic | Optics Atomic Physics |
| url | https://arxiv.org/abs/2310.04210 |