Signature of multi-channel interference in high-order harmonic generation from N2 driven by intense mid-infrared pulses

Guihua Li; Jinping Yao; Xinhua Xie; Hongqiang Xie; Bin Zeng; Wei Chu; Chenrui Jing; Jielei Ni; Haisu Zhang; Xiaojun Liu; Jing Chen; Ya Cheng; Zhizhan Xu

arXiv · 1306.0177

Signature of multi-channel interference in high-order harmonic generation from N2 driven by intense mid-infrared pulses

Guihua Li·Jinping Yao·Xinhua Xie·Hongqiang Xie·Bin Zeng·Wei Chu·Chenrui Jing·Jielei Ni·Haisu Zhang·Xiaojun Liu·Jing Chen·Ya Cheng·Zhizhan Xu

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Abstract

We investigate the multi-electron dynamics in high-order harmonic generation (HHG) from N2 molecules. Clear spectral minima are observed in the cutoff region at all three mid-infrared wavelengths (i.e., 1300, 1400 and 1500 nm) chosen in our experiment. It is found that the positions of the spectral minima do not depend on the alignment angles of molecules. In addition, the spectral minima shift almost linearly with the increasing laser intensity at all three wavelengths, which provides a strong evidence on the dynamic multi-channel interference origin of these minima. The advantages of observation of dynamic multi-channel interference based on HHG driven by long wavelength lasers are discussed.

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Guihua Li, Jinping Yao, Xinhua Xie, Hongqiang Xie, Bin Zeng, Wei Chu, Chenrui Jing, Jielei Ni, Haisu Zhang, Xiaojun Liu, Jing Chen, Ya Cheng, Zhizhan Xu. 2013-06-02. Signature of multi-channel interference in high-order harmonic generation from N2 driven by intense mid-infrared pulses. https://arxiv.org/abs/1306.0177

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