Attosecond pulse generation by applying a weak static electric field to a few-cycle pulse

作者：Zhao, Guangjiu^*; Guo, Xiaolv; Shao, Tianjiao; Xue, Kang

来源：New Journal of Physics, 2011, 13: 093035.

DOI：10.1088/1367-2630/13/9/093035

• EXTREME-ULTRAVIOLET RADIATION
• HIGH-HARMONIC GENERATION
• LASER
• ATOM
• IONIZATION
• DYNAMICS
• PLATEAU

The high-order harmonic generation process under the combination of a few-cycle pulse and a static electric field was investigated in this work. A linear harmonic cutoff extension was observed with its dependence on the relative strength ratio of the static electric field with respect to a single-color, 2.5 optical cycle (oc), 800 nm, 1.4 x 10(15) W cm(-2) few-cycle pulse as the fundamental driving field. Exploiting the relative strength ratio tuning from 0 to 0.1, a linear continuum width extending on the XUV spectrum up to 191 eV, which supports the creation of an 18 attosecond isolated attosecond pulse, was generated. Moreover, classical trajectory calculation and time-frequency analyses for explaining the mechanism are also presented.

• 出版日期2011-9-22
• 单位分子反应动力学国家重点实验室; 大连理工大学; 东北师范大学; 中国科学院大连化学物理研究所