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Quantum control of ultrafast magnetic field in H32+ molecules by tricircular polarized laser pulses |
| Qing-Yun Xu(徐清芸), Yong-Lin He(何永林), Zhi-Jie Yang(杨志杰), Zhi-Xian Lei(雷志仙),Shu-Juan Yan(闫淑娟), Xue-Shen Liu(刘学深), and Jing Guo(郭静)† |
| Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China |
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Abstract We present a scheme to control the generated ultrafast magnetic field in $\rm H_{3}^{2+}$ molecules using multi-frequency tricircular pulses composed of co- and counter-rotating bicircular pulses. Simulations show that the field amplitude and the wavelength are two significant factors for magnetic field generation by tricircular pulses. Specifically, the strength of the magnetic field is linearly related to the field amplitude at $\lambda_0 = 50 $ nm, while at $\lambda_0 = 70 $ nm, the strength first increases and then decreases with the amplitude, this can be attributed to the resonance between the ground and excited states. Moreover, the phase and helicity of bicircular pulses are shown to have important effects on the magnetic field. The dependence of the magnetic field on the phase arises from the interference effect between multiple ionization pathways. These findings illustrate a guiding principle for controlling the magnetic field in molecular systems for future research in ultrafast magneto-optics.
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Received: 11 June 2022
Revised: 02 September 2022
Accepted manuscript online: 09 September 2022
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PACS:
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32.80.Rm
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(Multiphoton ionization and excitation to highly excited states)
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32.80.-t
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(Photoionization and excitation)
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42.25.Kb
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(Coherence)
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42.65.Re
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(Ultrafast processes; optical pulse generation and pulse compression)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 12074146). |
Corresponding Authors:
Jing Guo
E-mail: gjing@jlu.edu.cn
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Cite this article:
Qing-Yun Xu(徐清芸), Yong-Lin He(何永林), Zhi-Jie Yang(杨志杰), Zhi-Xian Lei(雷志仙),Shu-Juan Yan(闫淑娟), Xue-Shen Liu(刘学深), and Jing Guo(郭静) Quantum control of ultrafast magnetic field in H32+ molecules by tricircular polarized laser pulses 2023 Chin. Phys. B 32 033202
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