Dual-Color Laser Induced Terahertz Generation in Strong Field Approximation
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.
Keywords
Cite
@article{arxiv.1904.12163,
title = {Dual-Color Laser Induced Terahertz Generation in Strong Field Approximation},
author = {Kaixuan Zhang and Yizhu Zhang and Shuai Li and Xincheng Wang and Tian-Min Yan and Y. H. Jiang},
journal= {arXiv preprint arXiv:1904.12163},
year = {2019}
}