Two-center interference in high-harmonic generation of H2%＋ in a combination of a mid-infrared laser field and a terahertz field

We theoretically investigate the two-center interference in high-order harmonics generated from the H2-＋ in a combination of a mid-infrared laser and a terahertz field by numerically solving the time-dependent Schr ¨odinger equation（TDSE）.The interference minima in high-order harmonic generation（HHG...

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Bibliographic Details
Published in:中国物理B：英文版 2017, Vol.26 (1), p.176-181
Main Author: 张军 潘雪飞 徐彤彤 张宏丹 杜慧 郭静 刘学深
Format: Article
Language:English
Subjects:
中红外激光
双中心
发射时间
太赫兹
数值求解
激光场
高次谐波产生
高次谐波干扰
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Summary:We theoretically investigate the two-center interference in high-order harmonics generated from the H2-＋ in a combination of a mid-infrared laser and a terahertz field by numerically solving the time-dependent Schr ¨odinger equation（TDSE）.The interference minima in high-order harmonic generation（HHG） are effectively suppressed when a THz field is added.The contribution to HHG from the two separate nuclei is used to demonstrate the locating order of the harmonic minima.Furthermore, we also investigate the emission time of harmonics. The results show that the intensity of the short path around 60^th order after adding a THz field is stronger than that in the mid-infrared laser field, which further illustrates the suppression of the interference minima in HHG.
ISSN:1674-1056
2058-3834
DOI:10.1088/1674-1056/26/1/013202