Frequency dependence of quantum path interference in non-collinear high-order harmonic generation

High-order harmonic generation（HHG） driven by two non-collinear beams including a fundamental and its weak second harmonic is numerically studied. The interference of harmonics from adjacent electron quantum paths is found to be dependent on the relative delay of the driving pulse, and the dependenc...

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Published inChinese physics B Vol. 25; no. 2; pp. 129 - 134
Main Author 钟诗阳 贺新奎 滕浩 叶蓬 汪礼锋 何鹏 魏志义
Format Journal Article
LanguageEnglish
Published 01.02.2016
Subjects
Beams (radiation)
Delay
Dipoles
Gain
Harmonic generations
Harmonics
Interference
Interference fringes
二次谐波
共线
干扰频率
数值模拟
路径
量子
频率依赖性
高次谐波
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ISSN1674-1056
2058-3834
1741-4199
DOI10.1088/1674-1056/25/2/023301

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Summary:High-order harmonic generation（HHG） driven by two non-collinear beams including a fundamental and its weak second harmonic is numerically studied. The interference of harmonics from adjacent electron quantum paths is found to be dependent on the relative delay of the driving pulse, and the dependences are different for different harmonic orders.This frequency dependence of the interference is attributed to the spatial frequency chirp in the HHG beam resulting from the harmonic dipole phase, which in turn provides a potential way to gain an insight into the generation of high-order harmonics. As an example, the intensity dependent dipole phase coefficient α is retrieved from the interference fringe.
Bibliography:High-order harmonic generation（HHG） driven by two non-collinear beams including a fundamental and its weak second harmonic is numerically studied. The interference of harmonics from adjacent electron quantum paths is found to be dependent on the relative delay of the driving pulse, and the dependences are different for different harmonic orders.This frequency dependence of the interference is attributed to the spatial frequency chirp in the HHG beam resulting from the harmonic dipole phase, which in turn provides a potential way to gain an insight into the generation of high-order harmonics. As an example, the intensity dependent dipole phase coefficient α is retrieved from the interference fringe.
Shi-Yang Zhong, Xin-Kui He, Hao Teng, Peng Ye, Wel Li-Feng Wang, Peng He, and Zhi-Yi Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 1 O0190, China
high harmonic generation, non-collinear, dipole phase, ultrafast optics
11-5639/O4
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/25/2/023301