Phase jump in multiphoton resonant harmonic emission driven by strong frequency-comb fields

Chen Chunjuan; Zhao Yuanyuan; Zhao Di; Jiang Chenwei; Fang Aiping; Gao Shaoyan; Li Fuli

doi:10.11884/HPLPB202032.190453

Volume 32 Issue 1

Dec. 2019

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Chen Chunjuan, Zhao Yuanyuan, Zhao Di, et al. Phase jump in multiphoton resonant harmonic emission driven by strong frequency-comb fields[J]. High Power Laser and Particle Beams, 2020, 32: 011016. doi: 10.11884/HPLPB202032.190453

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Chen Chunjuan, Zhao Yuanyuan, Zhao Di, et al. Phase jump in multiphoton resonant harmonic emission driven by strong frequency-comb fields[J]. High Power Laser and Particle Beams, 2020, 32: 011016. doi: 10.11884/HPLPB202032.190453

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Phase jump in multiphoton resonant harmonic emission driven by strong frequency-comb fields

doi: 10.11884/HPLPB202032.190453

Department of Applied Physics, Xi'an Jiaotong University, Xi'an 710049, China

Received Date: 2019-11-25
Rev Recd Date: 2019-12-30
Publish Date: 2019-12-26

Abstract

Abstract

This paper presents a theoretical investigation of the phase jump of multiphoton harmonic emission driven by two frequency-comb fields. The Floquet theorem is employed to provide a nonperturbative and exact treatment of the interaction between a quantum system and frequency-comb fields. Multiple multiphoton-transition paths for the harmonic emission are coherently summed. The phase information about paths can be extracted via the Fourier Transform analysis of the harmonic signals which oscillate as a function of the relative phase between two frequency-comb fields. Phase jumps were observed when harmonic emission was sweeping across the resonance by varying the frequency or intensity of two frequency-comb fields, which allows us to observe the Stark-shifted transition energy of resonant frequency of quantum system driven by strong laser fields.
- phase jump,
- high-order harmonic generation,
- Stark-shifted transition energy,
- ultraintense laser

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References(40)

References

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