Orientation-dependent stereo Wigner time delay and electron localization in a small molecule

被引：158

作者：

Vos, J. ^{[1
]}

Cattaneo, L. ^{[1
]}

Patchkovskii, S. ^{[2
]}

Zimmermann, T. ^{[3
,4
]}

Cirelli, C. ^{[1
,5
]}

Lucchini, M. ^{[1
,7
]}

Kheifets, A. ^{[6
]}

Landsman, A. S. ^{[3
,4
]}

Keller, U. ^{[1
]}

机构：

[1] Swiss Fed Inst Technol, Dept Phys, CH-8093 Zurich, Switzerland

[2] Max Born Inst, D-12489 Berlin, Germany

[3] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany

[4] Postech, Dept Phys, Max Planck Korea, Pohang, South Korea

[5] Empa Swiss Fed Labs Mat Sci & Technol, CH-8600 Dubendorf, Switzerland

[6] Australian Natl Univ, Res Sch Phys & Engn, Canberra, ACT 0200, Australia

[7] Politecn Milan, Dept Phys, I-20133 Milan, Italy

来源：

SCIENCE | 2018年 / 360卷 / 6395期

基金：

瑞士国家科学基金会; 新加坡国家研究基金会;

关键词：

HIGH HARMONIC-GENERATION; MOMENTUM SPECTROSCOPY; VECTOR CORRELATIONS; RECOIL-ION; PHOTOIONIZATION; PHOTOEMISSION; IONIZATION; DYNAMICS;

D O I：

10.1126/science.aao4731

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Attosecond metrology of atoms has accessed the time scale of the most fundamental processes in quantum mechanics. Transferring the time-resolved photoelectric effect from atoms to molecules considerably increases experimental and theoretical challenges. Here we show that orientation-and energy-resolved measurements characterize the molecular stereo Wigner time delay. This observable provides direct information on the localization of the excited electron wave packet within the molecular potential. Furthermore, we demonstrate that photoelectrons resulting from the dissociative ionization process of the CO molecule are preferentially emitted from the carbon end for dissociative (2)Sigma states and from the center and oxygen end for the (2)Pi states of the molecular ion. Supported by comprehensive theoretical calculations, this work constitutes a complete spatially and temporally resolved reconstruction of the molecular photoelectric effect.

引用

页码：1326 / 1330

页数：5

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