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arXiv 2003.11884physics.optics
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利用双脉冲产生光子能量和谱宽可调的高次谐波

Generation of high-order harmonics with tunable photon energy and spectral width using double pulses

Lénárd Gulyás Oldal, Tamás Csizmadia, Peng Ye, Nandiga Gopalakrishna Harshitha, Amelle Zaïr, Subhendu Kahaly, Katalin Varjú, Miklós Füle, Balázs Major

摘要:

本文从理论上研究了两束延时超短激光脉冲驱动下稀有气体原子中高次谐波的产生。除了它们的时间延迟之外,这两个脉冲是相同的。使用单原子模型的激光-物质相互作用,它表明,所产生的谐波的光子能量是可控的范围内的一个eV的带宽可比的基本字段的光子能量-通过改变产生的激光脉冲之间的时间延迟。它还表明,高次谐波产生的双脉冲具有有利的特性,模仿某些性质的极紫外(XUV)单色仪。与其他方法相比,所提出的方法可以以低得多的成本和相对较高的光谱产率实现更简单的设置。

英文摘要:

This work theoretically investigates high-order harmonic generation in rare gas atoms driven by two temporally delayed ultrashort laser pulses. Apart from their temporal delay, the two pulses are identical. Using a single-atom model of the laser-matter interaction it is shown that the photon energy of the generated harmonics is controllable within the range of one eV -- a bandwidth comparable to the photon energy of the fundamental field -- by varying the time delay between the generating laser pulses. It is also demonstrated that high-order harmonics generated by double pulses have advantageous characteristics, which mimick certain properties of an extreme ultraviolet (XUV) monochromator. With the proposed method, a simpler setup at a much lower cost and comparatively higher spectral yield can be implemented in contrast to other approaches.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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