发表论文 - 蒋 臣威
| 论文标题 | Multi-level effects in the high-order harmonic generation driven by intense frequency-comb laser fields |
| 作者 | Zhao, D (Zhao Di)[ 1 ] ; Jiang, CW (Jiang Chen-Wei)[ 1 ] ; Li, FL (Li Fu-Li)[ 1 |
| 发表/完成日期 | 2015-07-01 |
| 期刊名称 | CHINESE PHYSICS B |
| 期卷 | 24 |
| 相关文章 | |
| 论文简介 | High harmonic generation (HHG) driven by intense frequency-comb laser fields can be dramatically enhanced via multiphoton resonance by tuning the carrier-envelope phase (CEP) shift, without increasing the driving intensity. However, the multiphoton-resonant enhancement (MRE) factor in the realistic atomic hydrogen is much smaller than that in a twolevel system. To study the deviation, we present a theoretical investigation of the multiphoton resonance dynamics of three-level systems driven by intense frequency-comb laser fields. The many-mode Floquet theorem (MMFT) is employed to provide a nonperturbative and exact treatment of the interaction between the quantum system and the laser fields. The investigations show that the dipole interaction of a two-level system with the third level affects the multiphoton resonance dynamics and enhances the HHG spectra. It is the dipole interaction of the excited level of the two-level system with other levels that results in the smaller MRE factor in the realistic atomic system. |
(创新港)
