外文题目: Generation of attosecond pulse pair in polar media by chirped few-cycle pulses
作者: Hu, Pidong; Niu, Yueping; Wang, Xiangxin; Gong, Shangqing; Liu, Chengpu
刊名: J. Opt.
年: 2016 卷: 18 期: 9 文章编号：95504
英文关键词:
high-order harmonic generation; attosecond pulse pair; polar media; chirped pulses; propagation effects
HIGH-HARMONIC-GENERATION; PERMANENT DIPOLE-MOMENT; 2-LEVEL ATOM; PARA-NITROANILINE; LASER FIELDS; RARE-GASES; DRIVEN; IONIZATION; EQUATIONS; RADIATION
英文摘要:
The high-order harmonic generation in a polar medium driven by an initially chirped few-cycle laser pulse is investigated via numerically solving the nonlinear Bloch or Maxwell-Bloch equations based on whether propagation effects are taken into account or not. As a result of the reduction of quantum trajectories number due to the introduction of chirps, an attosecond pulse pair (APP) is generated instead of a general attosecond pulse train. Moreover, the time delay between the two attosecond pulses is tunable. When propagation effects take roles, the peak intensities of the APP can be enhanced at suitable propagation distances without observable duration broadening, and such an enhancement can be modulated by changing medium density.


文献类型: 期刊论文
正文语种: English
收录类别: SCIEI
DOI: 10.1088/2040-8978/18/9/095504


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