Ultraviolet Source Assisted Enhancement of Attosecond Pulse  

利用超短紫外光源增强阿秒脉冲的强度

作　　者：冯立强[1,2] 刘航[3] 

机构地区：[1]辽宁工业大学理学院,锦州121001 [2]中国科学院大连化学物通研究所分子反应动力学国家重点实验室,大连116023 [3]辽宁工业大学化学与环境工程学院,锦州121001

出　　处：《Chinese Journal of Chemical Physics》2015年第1期21-26,I0001,共7页化学物理学报（英文）

摘　　要：A promising method to improve the attosecond pulse intensity has been theoretically pre- sented by properly adding an ultraviolet pulse into the orthogonal two-color field. The results show that by properly adding a 125 nm ultraviolet pulse to the orthogonal two-color field, not only the harmonic yield is enhanced by 2 orders of magnitude compared with the original orthogonal two-color field case, but also the single short quantum path, which is selected to contribute to the harmonic spectrum, results in an ultrabroad 152 eV bandwidth. Moreover, by optimizing the laser parameters, we find that the harmonic enhancement is not very sen- sitive to the pulse duration and the polarized angle of the assisted ultraviolet pulse, which is much better for experimental realization. As a result, an isolated pulse with duration of 38 as can be obtained, which is 2 orders of magnitude improvement in comparison with the original two-color orthogonal field case.

关 键 词：High-order harmonic generation Isolated pulse Two-color orthogonal field Ultraviolet source 

分 类 号：O[理学]