High-order Harmonic Generation and Multi-photon Ionization of Na2 in Laser Fields

• 作者: Meng Kelai Xiao Guoqing Zhang Fengshou Zhang Yanping
• 来源期刊: 近代物理研究所和兰州重离子加速器实验室年报：英文版
• 学科: 化学
• 关键词: 高次谐波产生 双色激光场 钠分子 多光子 电离 局域密度近似 相干辐射 相互作用
• 年，卷（期）: 2005,（1）
• 页码范围: 124-125
• 页数: 2页
• 分类号: O614.112

摘要

<正>High-order harmonic generation (HHG) is a coherent interaction process between atoms or molecules and a driving laser field. It can produce ultra-short coherent radiation to reach the soft X-ray region. The application of a two-color laser field for HHG has been a fascinating topic of research since recent developments in laser technology have made it possible to produce laser pulses with variable and controllable amplitudes and phases even in the ultra-short and intense range.In the frame of the time-dependent local density approximation (TDLDA) , when an external field Vext=E(t)x is applied, the changes of dipole moments of Na2 in the x,y,z directions can be described as the following