Molecular orbital tomography from multi-channel harmonic emission in N2

被引：19

作者：

Diveki, Z. ^{[1
]}

Guichard, R. ^{[2
,3
]}

Caillat, J. ^{[2
,3
]}

Camper, A. ^{[1
]}

Haessler, S. ^{[4
]}

Auguste, T. ^{[1
]}

Ruchon, T. ^{[1
]}

Carre, B. ^{[1
]}

Maquet, A. ^{[2
]}

Taieb, R. ^{[2
,3
]}

Salieres, P. ^{[1
]}

机构：

[1] CEA Saclay, IRAMIS, Serv Photons Atomes & Mol, F-91191 Gif Sur Yvette, France

[2] Univ Paris 06, Lab Chim Phys Mat & Rayonnement, UMR 7614, F-75231 Paris 05, France

[3] LCPMR, CNRS, UMR 7614, Paris, France

[4] Vienna Univ Technol, Photon Inst, A-1040 Vienna, Austria

来源：

CHEMICAL PHYSICS | 2013年 / 414卷

基金：

欧盟第七框架计划;

关键词：

High-order harmonic generation; Strong field physics; Molecules; MULTIELECTRON DYNAMICS; GENERATION; IONIZATION; RADIATION; SOFT;

D O I：

10.1016/j.chemphys.2012.03.021

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

High-order harmonic generation in aligned molecules can be used as an ultrafast probe of molecular structure and dynamics. By characterizing the emitted signal, one can retrieve information about electronic and nuclear dynamics at the attosecond timescale. In this paper, we discuss the theoretical and experimental aspects of molecular orbital tomography in N-2 and investigate the influence of multi-channel ionization on the orbital imaging. By analyzing the harmonics' spectral phase as a function of the driving laser intensity, we address two distinct cases, which in principle allow the orbital reconstruction. First, the contributions from two molecular orbitals could be disentangled in the real and imaginary parts of the measured dipole, allowing to reconstruct both orbitals. Second, by decreasing the driving laser intensity, the transition from a multi-channel to a single-channel ionization regime is shown. The latter approach paves the way towards the generalization of tomography to more complex systems. (c) 2012 Elsevier B.V. All rights reserved.

引用

页码：121 / 129

页数：9

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