| ATOMIC AND MOLECULAR PHYSICS |
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Real-Time Observation of Electron-Hole Coherence Induced by Strong-Field Ionization |
| Jing Zhao1, Jinlei Liu1, Xiaowei Wang1, Jianmin Yuan1,2, and Zengxiu Zhao1* |
1Department of Physics, National University of Defense Technology, Changsha 410073, China
2Graduate School of China Academic of Engineering Physics, Beijing 100193, China
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| Cite this article: |
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Jing Zhao, Jinlei Liu, Xiaowei Wang et al 2022 Chin. Phys. Lett. 39 123201 |
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Abstract We introduce and demonstrate a new approach to measure the electron-hole dynamics and coherence induced by strong-field ionization using hole-assisted high-harmonic spectroscopy. The coherent driving of the infrared and XUV pulses correlates the dynamics of the core-hole and the valence-hole by coupling multiple continua, which leads to the otherwise forbidden absorption and emission of high harmonics. An analytical model is developed based on the strong-field approximation by taking into account the essential multielectron configurations. The emission spectra from the core-valence transition and the core-hole recombination are found to modulate strongly as functions of the time delay between the two pulses, suggesting that the coherent electron wave packets in multiple continua can be utilized to temporally resolve the core-valence transition in attoseconds.
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Received: 20 October 2022
Express Letter
Published: 30 November 2022
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| PACS: |
32.80.Rm
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(Multiphoton ionization and excitation to highly excited states)
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42.50.Hz
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(Strong-field excitation of optical transitions in quantum systems; multiphoton processes; dynamic Stark shift)
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42.65.Ky
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(Frequency conversion; harmonic generation, including higher-order harmonic generation)
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