期刊
PHYSICAL REVIEW LETTERS
卷 117, 期 9, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.117.093003
关键词
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资金
- European Research Council [XCHEM 290853]
- MINECO Project [FIS2013-42002-R]
- ERA-Chemistry Project [PIM2010EEC-00751]
- European Grant [MC-ITN CORINF]
- European COST Action [XLIC CM1204]
- CAM project NANOFRONTMAG
- FCT-Fundacao para a Ciencia e Tecnologia, Portugal [SFRH/BD/84053/2012]
- Fundação para a Ciência e a Tecnologia [SFRH/BD/84053/2012] Funding Source: FCT
One of the current challenges in high-harmonic generation is to extend the harmonic cutoff to increasingly high energies while maintaining or even increasing the efficiency of the high-harmonic emission. Here we show that the combined effect of down-chirped pulses and nuclear dynamics in light molecules allows one to achieve this goal, provided that long enough IR pulses are used to allow the nuclei to move well outside the Franck-Condon region. We also show that, by varying the duration of the chirped pulse or by performing isotopic substitution while keeping the pulse duration constant, one can control the extension of the harmonic plateau.
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