Spectral shifts and asymmetries in mid-infrared assisted high-order harmonic generation

Spectral shifts and asymmetries in mid-infrared assisted high-order harmonic generation
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DOI：
10.1364/josab.35.000a32
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发表时间：
2018-04
期刊：
Journal of The Optical Society of America B-optical Physics
影响因子：
1.9
通讯作者：
B. Major;E. Balogh;K. Kovács;Song Han;B. Schütte;P. Weber;M. Vrakking;V. Tosa;A. Rouzée;K. Varjú
B. Major;E. Balogh;K. Kovács;Song Han;B. Schütte;P. Weber;M. Vrakking;V. Tosa;A. Rouzée;K. Varjú
中科院分区：
物理与天体物理3区
文献类型：
--
作者：
B. Major;E. Balogh;K. Kovács;Song Han;B. Schütte;P. Weber;M. Vrakking;V. Tosa;A. Rouzée;K. Varjú

文献摘要

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研究了800 nm强多周期激光脉冲在1300 nm弱中红外（MIR）脉冲存在下产生的高次谐波。除了先前观察到的产率提高、截止延长和连续体产生的影响外，我们在这里报告了由MIR脉冲的延迟控制的谐波峰的频谱移位。我们考虑到双色场的半周期到半周期行为来解释这种效应。
We study high-order harmonics generated by an intense multicycle 800 nm laser pulse in the presence of a weaker 1300 nm mid-infrared (MIR) pulse. Additionally to the previously observed effects of yield enhancement, cutoff extension, and continuum generation, we report here a spectral shift of harmonic peaks controlled by the delay of the MIR pulse. We explain this effect considering the half-cycle to half-cycle behavior of the two-color field.