Strong-Field Extreme-Ultraviolet Dressing of Atomic Double Excitation

被引：44

作者：

Ott, Christian ^{[1
]}

Aufleger, Lennart ^{[1
]}

Ding, Thomas ^{[1
]}

Rebholz, Marc ^{[1
]}

Magunia, Alexander ^{[1
]}

Hartmann, Maximilian ^{[1
]}

Stooss, Veit ^{[1
]}

Wachs, David ^{[1
]}

Birk, Paul ^{[1
]}

Borisova, Gergana D. ^{[1
]}

Meyer, Kristina ^{[1
]}

Rupprecht, Patrick ^{[1
]}

Castanheira, Carina da Costa ^{[1
]}

Moshammer, Robert ^{[1
]}

Attar, Andrew R. ^{[2
]}

Gaumnitz, Thomas ^{[3
]}

Loh, Zhi-Heng ^{[4
,5
]}

Dueterer, Stefan ^{[6
]}

Treusch, Rolf ^{[6
]}

Ullrich, Joachim ^{[7
]}

Jiang, Yuhai ^{[8
]}

Meyer, Michael ^{[9
]}

Lambropoulos, Peter ^{[10
,11
]}

Pfeifer, Thomas ^{[1
]}

机构：

[1] Max Planck Inst Kernphys, Saupfercheckweg 1, D-69117 Heidelberg, Germany

[2] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA

[3] Swiss Fed Inst Technol, Lab Phys Chem, Vladimir Prelog Weg 2, CH-8093 Zurich, Switzerland

[4] Nanyang Technol Univ, Sch Phys & Math Sci, Div Chem & Biol Chem, Singapore 637371, Singapore

[5] Nanyang Technol Univ, Sch Phys & Math Sci, Div Phys & Appl Phys, Singapore 637371, Singapore

[6] DESY, Notkestr 85, D-22607 Hamburg, Germany

[7] Phys Tech Bundesanstalt, Bundesallee 100, D-38116 Braunschweig, Germany

[8] Chinese Acad Sci, Shanghai Adv Res Inst, Shanghai 201210, Peoples R China

[9] European XFEL GmbH, Holzkoppel 4, D-22869 Schenefeld, Germany

[10] Univ Crete, Dept Phys, Iraklion 71003, Crete, Greece

[11] IESL Forth, Iraklion 71003, Crete, Greece

来源：

PHYSICAL REVIEW LETTERS | 2019年 / 123卷 / 16期

基金：

欧洲研究理事会; 中国国家自然科学基金;

关键词：

ATTOSECOND DYNAMICS; 2-ELECTRON ATOMS; HIGH-RESOLUTION; FANO RESONANCE; ELECTRON; STATES; PHASE;

D O I：

10.1103/PhysRevLett.123.163201

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on the experimental observation of a strong-field dressing of an autoionizing two-electron state in helium with intense extreme-ultraviolet laser pulses from a free-electron laser. The asymmetric Fano line shape of this transition is spectrally resolved, and we observe modifications of the resonance asymmetry structure for increasing free-electron-laser pulse energy on the order of few tens of Microjoules. A quantum-mechanical calculation of the time-dependent dipole response of this autoionizing state, driven by classical extreme-ultraviolet (XUV) electric fields, evidences strong-field-induced energy and phase shifts of the doubly excited state, which are extracted from the Fano line-shape asymmetry. The experimental results obtained at the Free-Electron Laser in Hamburg (FLASH) thus correspond to transient energy shifts on the order of a few meV, induced by strong XUV fields. These results open up a new way of performing nonperturbative XUV nonlinear optics for the light-matter interaction of resonant electronic transitions in atoms at short wavelengths.

引用

页数：6

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