| ATOMIC AND MOLECULAR PHYSICS |
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Rabi Oscillations and Coherence Dynamics in Terahertz Streaking-Assisted Photoelectron Spectrum |
| Shuai Wang1,4, Zhiyuan Zhu1,2,4*, Yizhu Zhang3, Tian-Min Yan2*, and Yuhai Jiang1,2,5* |
1School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
2Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
3Center for Terahertz Waves and College of Precision Instrument and Optoelectronics Engineering, Key Laboratory of Opto-electronics Information and Technical Science (Ministry of Education), Tianjin University, Tianjin 300072, China
4Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China
5University of Chinese Academy of Sciences, Beijing 100049, China
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| Cite this article: |
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Shuai Wang, Zhiyuan Zhu, Yizhu Zhang et al 2021 Chin. Phys. Lett. 38 013401 |
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Abstract We present an approach, a Terahertz streaking-assisted photoelectron spectrum (THz SAPS), to achieve direct observations of ultrafast coherence dynamics with timescales beyond the pulse duration. Using a 24 fs probe pulse, the THz SAPS enables us to well visualize Rabi oscillations of 11.76 fs and quantum beats of 2.62 fs between the ${5S_{1/2}}$ and ${5P_{3/2}}$ in rubidium atoms. The numerical results show that the THz SAPS can simultaneously achieve high resolution in both frequency and time domains without the limitation of Heisenberg uncertainty of the probe pulse. The long probe pulse promises sufficiently high frequency resolution in photoelectron spectroscopy allowing to observe Autler–Townes splittings, whereas the streaking THz field enhances temporal resolution for not only Rabi oscillations but also quantum beats between the ground and excited states. The THz SAPS demonstrates a potential applicability for observation and manipulation of ultrafast coherence processes in frequency and time domains.
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Received: 13 September 2020
Published: 06 January 2021
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| PACS: |
34.80.Pa
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(Coherence and correlation)
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32.80.-t
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(Photoionization and excitation)
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| Fund: Supported by the National Natural Science Foundation of China (Grant Nos. 11827806, 11874368 and 61675213). |
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