Molecular Imaging Using High-Order Harmonic Generation and Above-Threshold Ionization

被引：43

作者：

van der Zwan, Elmar V. ^{[1
,2
,3
]}

Lein, Manfred ^{[1
,2
]}

机构：

[1] Leibniz Univ Hannover, Inst Theoret Phys, D-30167 Hannover, Germany

[2] Leibniz Univ Hannover, Ctr Quantum Engn & Space Time Res QUEST, D-30167 Hannover, Germany

[3] Univ Kassel, Inst Phys, D-31432 Kassel, Germany

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 108卷 / 04期

关键词：

MULTIELECTRON DYNAMICS; SCHRODINGER-EQUATION; ALIGNED MOLECULES; INTERFEROMETRY; ORBITALS; EMISSION; PULSES;

D O I：

10.1103/PhysRevLett.108.043004

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Accurate molecular imaging via high-order harmonic generation relies on comparing harmonic emission from a laser-irradiated molecule and an adequate reference system. However, an ideal reference atom with the same ionization properties as the molecule is not always available. We show that for suitably designed, very short laser pulses, a one-to-one mapping from high-order harmonic frequencies to electron momenta in above-threshold ionization exists. Comparing molecular and atomic momentum distributions then provides the electron recollision amplitude in the molecule for enhanced molecular imaging. The method retrieves the molecular recombination transition moments highly accurately, even with suboptimal reference atoms.

引用

页数：5

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