Attosecond-pulse-controlled high-order harmonic generation in ultrashort laser fields

作者：Wang Bingbing^*; Chen J; Liu Jie; Yan Zong Chao; Fu Panming

来源：Physical Review A, 2008, 78(2): 023413.

DOI：10.1103/PhysRevA.78.023413

By solving the three-dimensional time-dependent Schrodinger equation, we study how to control the high-order harmonic generation (HHG) in a hydrogenlike neon, which is exposed to an extreme-ultraviolet (xuv) attosecond laser pulse followed by an infrared (ir) femtosecond pulse. The xuv pulse prepares the atom as a superposition of the ground state, the excited states, and the continuum. These three types of states provide different contributions to the high-order harmonics generated by the following it pulse. In particular, the contributions from the excited states and the continuum extend the cutoff frequency of the harmonic spectrum. Moreover, the effect of the carrier-envelope phase of the it pulse on the HHG has been studied. The structure of the laser-dressed atom can be imaged using this two-color scheme.

• 出版日期2008-8
• 单位北京应用物理与计算数学研究所; 哈尔滨工业大学; 中国科学院