量子电子学报2012，Vol.29Issue(5)：530-535,6.DOI:10.3969/j.issn.1007-5461.2012.05.003
中红外双色场量子轨道调控下宽谱带阿秒脉冲的产生
Broad bandwidth attosecond pulse generation using mid-infrared two color field to control quantum trajectory
李林 1罗江华2
作者信息
- 1. 长江大学物理科学与技术学院,湖北 荆州 434023
- 2. 武汉光电国家实验室,湖北武汉 430074
- 折叠
摘要
Abstract
A method to generate a broadband water window continuum high-order harmonic generation spectra is proposed using a few-cycle two-color driving pulse synthesized by 2000 nm mid-infrared laser driving field and its much weaker 1000 nm second harmonic modulation field. In the scheme, the ionization step can be modulated by the weaker second harmonic, which not only broadens the bandwidth but also enhances the yields of the continuum harmonics. By solving time-dependent Schrodinger equation based on one-dimensional helium atom model, it is found that a broadband continuum harmonic spectrum with bandwidth of 190 eV is observed and the yield of the continuum harmonics is increased by two orders compared with one-color 2000 nm driving field alone. Furthermore, adjusting the carrier envelop phase between the two-color field can enhance the contribution of one ionization trajectories and simultaneously suppress the other one, from which an isolated 70 as pulse can be obtained.关键词
X射线光学/高次谐波/双色场/连续谱Key words
X-ray optics/ high-order harmonic generation/ two-color field/ continuum spectrum分类
数理科学引用本文复制引用
李林,罗江华..中红外双色场量子轨道调控下宽谱带阿秒脉冲的产生[J].量子电子学报,2012,29(5):530-535,6.
