Near-Threshold High-Order Harmonic Spectroscopy with Aligned Molecules

被引：86

作者：

Soifer, H. ^{[1
]}

Botheron, P. ^{[2
]}

Shafir, D. ^{[1
]}

Diner, A. ^{[1
]}

Raz, O. ^{[1
]}

Bruner, B. D. ^{[1
]}

Mairesse, Y. ^{[2
]}

Pons, B. ^{[2
]}

Dudovich, N. ^{[1
]}

机构：

[1] Weizmann Inst Sci, Dept Phys Complex Syst, IL-76100 Rehovot, Israel

[2] Univ Bordeaux 1, CELIA, CNRS, CEA, F-33405 Talence, France

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 105卷 / 14期

基金：

以色列科学基金会;

关键词：

GENERATION; FIELD; INTERFEROMETRY; ORBITALS;

D O I：

10.1103/PhysRevLett.105.143904

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study high-order harmonic generation in aligned molecules close to the ionization threshold. Two distinct contributions to the harmonic signal are observed, which show very different responses to molecular alignment and ellipticity of the driving field. We perform a classical electron trajectory analysis, taking into account the significant influence of the Coulomb potential on the strong-field-driven electron dynamics. The two contributions are related to primary ionization and excitation processes, offering a deeper understanding of the origin of high harmonics near the ionization threshold. This Letter shows that high-harmonic spectroscopy can be extended to the near-threshold spectral range, which is in general spectroscopically rich.

引用

页数：4

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