Observation of recollision-based high-harmonic generation in liquid isopropanol and the role of electron scattering

被引：6

作者：

Alexander, Oliver ^{[1
]}

Barnard, Jonathan C. T. ^{[1
]}

Larsen, Esben W. ^{[1
,2
]}

Avni, Timur ^{[1
,3
]}

Jarosch, Sebastian ^{[1
]}

Gregory, Andrew ^{[1
]}

Parker, Susan ^{[1
]}

Galinis, Gediminas ^{[1
]}

Tofful, Alexandra ^{[1
]}

Garratt, Douglas ^{[1
]}

Matthews, Mary R. ^{[1
]}

Marangos, Jonathan P. ^{[1
]}

机构：

[1] Imperial Coll London, Blackett Lab, Quantum Opt & Laser Sci Grp, London SW7 2BW, England

[2] IMEC, Kapeldreef 75, Leuven 3001, Belgium

[3] Cent Laser Facil, Harlow Campus, Didcot OX11 0QX, England

来源：

PHYSICAL REVIEW RESEARCH | 2023年 / 5卷 / 04期

基金：

英国工程与自然科学研究理事会; 欧盟地平线“2020”;

关键词：

ATTOSECOND PULSES; CROSS-SECTIONS; IONIZATION; DYNAMICS;

D O I：

10.1103/PhysRevResearch.5.043030

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report extreme-ultraviolet high-harmonic generation (HHG) from liquid isopropanol, extending up to 50 eV, when using 1800-nm carrier envelope phase stable pulses of 1.8 cycles with intensities below the laser breakdown threshold. We study the mechanism of the harmonic emission through its dependence on the driving field and find it to be consistent with a strong-field recombination mechanism. We explore the role of scattering from neighboring molecules in simulations using empirical cross-section data. We find that these simulations, within a full propagation calculation, provide good quantitative agreement with the measured intensity-dependent harmonic cutoffs and demonstrate that HHG emission in the liquid phase can be used to corroborate ultrafast electron-scattering processes.

引用

页数：16

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