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arXiv · 1904.12163

Dual-Color Laser Induced Terahertz Generation in Strong Field Approximation

Kaixuan Zhang·Yizhu Zhang·Shuai Li·Xincheng Wang·Tian-Min Yan·Y. H. Jiang
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Abstract

The mechanism of the terahertz (THz) wave generation (TWG) in dual-color fields is elucidated within the theoretical framework of single-atom based strong field approximation (SFA). Evaluating the transition dipole moment, the continuum-continuum (CC) transition, rather than the continuum-bound recombination for the high-order harmonic generation, is confirmed to be the core mechanism of the TWG. The analytic form of the SFA-based CC description is consistent with the classical photoelectric current model, establishing the quantum-classical correspondence for the TWG. The theory is supported by parametric dependence of experimental THz yields calibrated by the joint measurement of the third-order harmonics. Present studies leave open the possibility of probing the ultrafast dynamics of continuum electron.

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Kaixuan Zhang, Yizhu Zhang, Shuai Li, Xincheng Wang, Tian-Min Yan, Y. H. Jiang. 2019-04-27. Dual-Color Laser Induced Terahertz Generation in Strong Field Approximation. https://arxiv.org/abs/1904.12163

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