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arXiv 1503.03294physics.atom-ph
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用laser诱导的电子衍射成像排列的多原子分子

Imaging an aligned polyatomic molecule with laser-induced electron diffraction

Michael Pullen, Benjamin Wolter, Anh-Thu Le, Matthias Baudisch, Michaël Hemmer, Arne Senftleben, Claus Dieter Schröter, Joachim Ullrich, Robert Moshammer, Chii-… 展开作者

Michael Pullen, Benjamin Wolter, Anh-Thu Le, Matthias Baudisch, Michaël Hemmer, Arne Senftleben, Claus Dieter Schröter, Joachim Ullrich, Robert Moshammer, Chii-Dong Lin, Jens Biegert

摘要:

激光诱导电子衍射是一种不断发展的桌面方法,其目的是以亚飞秒空间分辨率和飞秒时间分辨率对气相多原子分子的超快结构变化进行成像。在这里,我们提供了一般的基础,检索多个键长从一个多原子分子,同时测量C-C和C-H键长对齐乙炔。我们的方法超越了迄今为止实现的简单的双原子分子的成像的方法,是基于一个160 kHz的中红外几个周期的激光源与完整的三维电子-离子符合检测的组合。我们的技术提供了一个可访问的和强大的路线,对复杂的气相分子超快过程的成像与阿托飞秒的时间分辨率。

英文摘要:

Laser-induced electron diffraction is an evolving tabletop method, which aims to image ultrafast structural changes in gas-phase polyatomic molecules with sub-Ångström spatial and femtosecond temporal resolution. Here, we provide the general foundation for the retrieval of multiple bond lengths from a polyatomic molecule by simultaneously measuring the C-C and C-H bond lengths in aligned acetylene. Our approach takes the method beyond the hitherto achieved imaging of simple diatomic molecules and is based upon the combination of a 160 kHz mid-IR few-cycle laser source with full three-dimensional electron-ion coincidence detection. Our technique provides an accessible and robust route towards imaging ultrafast processes in complex gas phase molecules with atto- to femto-second temporal resolution.

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