Multi-channel electronic and vibrational dynamics in polyatomic resonant high-order harmonic generation

被引：71

作者：

Ferre, A. ^{[1
]}

Boguslavskiy, A. E. ^{[2
,3
]}

Dagan, M. ^{[4
]}

Blanchet, V. ^{[1
]}

Bruner, B. D. ^{[4
]}

Burgy, F. ^{[1
]}

Camper, A. ^{[5
]}

Descamps, D. ^{[1
]}

Fabre, B. ^{[1
]}

Fedorov, N. ^{[1
]}

Gaudin, J. ^{[1
]}

Geoffroy, G. ^{[1
]}

Mikosch, J. ^{[2
,6
]}

Patchkovskii, S. ^{[2
,6
]}

Petit, S. ^{[1
]}

Ruchon, T. ^{[5
]}

Soifer, H. ^{[4
]}

Staedter, D. ^{[7
]}

Wilkinson, I.

Stolow, A. ^{[2
,3
,8
]}

Dudovich, N. ^{[4
]}

Mairesse, Y. ^{[1
]}

机构：

[1] Univ Bordeaux, CNRS, CEA, CELIA,UMR5107, F-33405 Talence, France

[2] Natl Res Council Canada, Ottawa, ON K1A 0R6, Canada

[3] Univ Ottawa, Dept Phys, Ottawa, ON K1N 6N5, Canada

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

[5] CEA Saclay, CEA, IRAMIS, Interact & Dynam Lab LIDyL, F-91191 Gif Sur Yvette, France

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

[7] Univ Toulouse, CNRS, LCAR IRSAMC, F-31062 Toulouse, France

[8] Univ Ottawa, Dept Chem, Ottawa, ON K1N 6N5, Canada

来源：

NATURE COMMUNICATIONS | 2015年 / 6卷

基金：

加拿大自然科学与工程研究理事会; 欧洲研究理事会;

关键词：

FIELD; IONIZATION; PHOTOELECTRON; SPECTROSCOPY; REFLECTION; ATOMS; ION;

D O I：

10.1038/ncomms6952

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：

High-order harmonic generation in polyatomic molecules generally involves multiple channels of ionization. Their relative contribution can be strongly influenced by the presence of resonances, whose assignment remains a major challenge for high-harmonic spectroscopy. Here we present a multi-modal approach for the investigation of unaligned polyatomic molecules, using SF6 as an example. We combine methods from extreme-ultraviolet spectroscopy, above-threshold ionization and attosecond metrology. Fragment-resolved above-threshold ionization measurements reveal that strong-field ionization opens at least three channels. A shape resonance in one of them is found to dominate the signal in the 20-26 eV range. This resonance induces a phase jump in the harmonic emission, a switch in the polarization state and different dynamical responses to molecular vibrations. This study demonstrates a method for extending high-harmonic spectroscopy to polyatomic molecules, where complex attosecond dynamics are expected.

引用

页数：10

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