A femtosecond X-ray/optical cross-correlator

被引：124

作者：

Gahl, Cornelius ^{[1
,3
]}

Azima, Armin ^{[5
]}

Beye, Martin ^{[2
]}

Deppe, Martin ^{[2
]}

Doebrich, Kristian ^{[1
]}

Hasslinger, Urs ^{[2
]}

Hennies, Franz ^{[2
,4
]}

Melnikov, Alexej ^{[1
]}

Nagasono, Mitsuru ^{[2
]}

Pietzsch, Annette ^{[2
]}

Wolf, Martin ^{[1
]}

Wurth, Wilfried ^{[2
]}

Foehlisch, Alexander ^{[2
]}

机构：

[1] Free Univ Berlin, Fachbereich Phys, D-14195 Berlin, Germany

[2] Univ Hamburg, Inst Expt Phys, D-22761 Hamburg, Germany

[3] Max Born Inst Nichtlineare Opt & Kurzzeitphys, D-12489 Berlin, Germany

[4] Lund Univ, Max Lab, S-22100 Lund, Sweden

[5] HASYLAB DESY, D-22607 Hamburg, Germany

来源：

NATURE PHOTONICS | 2008年 / 2卷 / 03期

关键词：

D O I：

10.1038/nphoton.2007.298

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

For a fundamental understanding of ultrafast dynamics in chemistry, biology and materials science it has been a long-standing dream to record a molecular movie in which both the atomic trajectories and the chemical states of every atom in matter are followed in real time(1). Free- electron lasers provide this perspective as they deliver brilliant femtosecond X-ray pulses spanning a wide photon energy range, which is necessary to gather element- specific and chemical- stateselective information with femtosecond time resolution. The key challenge lies in synchronizing the free- electron lasers with separate optical lasers. We exploit the peak brilliance of the free- electron laser in Hamburg(2,3) ( FLASH) and establish X- raypulseinduced transient changes of the optical reflectivity in GaAs as a powerful tool for X- ray/ optical cross- correlation. This constitutes a breakthrough in the path towards recording a molecular movie and - equally importantly - opens up the field of femtosecond X- ray- induced dynamics, only accessible with high- brilliance X- ray free- electron lasers.

引用

页码：165 / 169

页数：5

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