Attosecond manipulation of ionization and efficient broadband supercontinuum generation in stretched molecules

作者：Wang Shao-Yi; Hong Wei-Yi; Zhang Qing-Bin; Li Qian-Guang; Lu Pei-Xiang^*

来源：Chinese Physics B, 2010, 19(8): 083203.

• attosecond manipulation
• attosecond pulse
• supercontinuum generation

We theoretically investigate the high-order harmonic generation from stretched molecules in a linearly polarized intense field. By adopting an infrared pulse combined with an ultraviolet (UV) attosecond pulse, the ionization process can be controlled effectively. In this excitation scheme, the harmonic spectrum beyond I-p 3.17U(p) is significantly enhanced by two orders, where I-p and U-p = e(2)E(0)(2)/(4me omega(2)) are the ionization and ponderomotive potential, then smooth broadband supercontinuum with the bandwidth of about 120 eV is obtained, which leads to an isolated sub-60-as attosecond pulse with a high signal-noise ratio. Moreover, the bandwidth of the supercontinuum is weakly dependent on the location and pulse duration of the UV pulse.

• 出版日期2010-8
• 单位湖北工程学院; 华中科技大学