High harmonic generation in mixed XUV and NIR fields at a free-electron laser

High harmonic generation in mixed XUV and NIR fields at a free-electron laser
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自由电子激光器在 XUV 和 NIR 混合场中产生高次谐波

DOI:
10.1088/2040-8986/ac4318
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发表时间:
2022
期刊:
影响因子:
2.1
通讯作者:
Bari, Sadia
Bari, Sadia
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Troß, Jan;Pathak, Shashank;Summers, Adam;Rompotis, Dimitrios;Erk, Benjamin;Passow, Christopher;Manschwetus, Bastian;Boll, Rebecca;Grychtol, Patrik;Bari, Sadia

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我们介绍了一项实验的结果,该实验研究了在自由电子激光器(FEL)提供的极紫外(XUV)场的情况下,飞秒近红外(NIR)激光脉冲产生高次谐波的情况,该过程被称为XUV辅助高次谐波产生(HHG)。我们的实验结果表明,XUV场可以导致一个小的增强时,XUV和NIR脉冲在时间上重叠的谐波产量,而一个强烈的HHG产量的下降和红移的HHG光谱观察时,XUV先于NIR脉冲。后者的意见是在定性协议与模型计算,考虑中性发射体的数量减少的影响,但在与预测的效果相匹配的相应增加的电离分数不一致。我们的研究表明,在自由电子激光器,这可能提供新的途径来研究相关驱动的电子动力学,以及新的方法来研究和控制传播效应和相位匹配的高次谐波的XUV辅助高次谐波实验的技术可行性。
We present the results of an experiment investigating the generation of high-order harmonics by a femtosecond near-infrared (NIR) laser pulse in the presence of an extreme ultraviolet (XUV) field provided by a free-electron laser (FEL), a process referred to as XUV-assisted high-order harmonic generation (HHG). Our experimental findings show that the XUV field can lead to a small enhancement in the harmonic yield when the XUV and NIR pulses overlap in time, while a strong decrease of the HHG yield and a red shift of the HHG spectrum is observed when the XUV precedes the NIR pulse. The latter observations are in qualitative agreement with model calculations that consider the effect of a decreased number of neutral emitters but are at odds with the predicted effect of the correspondingly increased ionization fraction on the phase matching. Our study demonstrates the technical feasibility of XUV-assisted HHG experiments at FELs, which may provide new avenues to investigate correlation-driven electron dynamics as well as novel ways to study and control propagation effects and phase matching in HHG.
DOI: 10.1107/s1600577518008585
发表时间: 2018-09-01
影响因子: 2.5
作者:
Erk B;Müller JP;Bomme C;Boll R;Brenner G;Chapman HN;Correa J;Düsterer S;Dziarzhytski S;Eisebitt S;Graafsma H;Grunewald S;Gumprecht L;Hartmann R;Hauser G;Keitel B;von Korff Schmising C;Kuhlmann M;Manschwetus B;Mercadier L;Müller E;Passow C;Plönjes E;Ramm D;Rompotis D;Rudenko A;Rupp D;Sauppe M;Siewert F;Schlosser D;Strüder L;Swiderski A;Techert S;Tiedtke K;Tilp T;Treusch R;Schlichting I;Ullrich J;Moshammer R;Möller T;Rolles D
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马克斯普朗克核物理研究所/汉堡大学/DESY(德国)
DOI: --
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期刊:
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发表时间: 2006-11
期刊: Physical Review A
影响因子: 2.9
作者:
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发表时间: 2014-06
影响因子: 1.3
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影响因子: 1.3
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通讯作者: J. Biegert;A. Heinrich;C. Hauri;W. Kornelis;P. Schlup;M. Anscombe;M. Gaarde;K. Schafer;U. Keller