Laser-induced electron diffraction is an evolving tabletop method that aims to image ultrafast structural changes in gas-phase polyatomic molecules with sub-Ångström spatial and femtosecond temporal resolutions. Here we demonstrate 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 on the combination of a 160 kHz mid-infrared 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.

中文翻译：

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用激光诱导的电子衍射成像排列的多原子分子。

激光诱导电子衍射是一种不断发展的桌面方法，旨在以亚ngström时空分辨率和飞秒时间分辨率对气相多原子分子的超快速结构变化进行成像。在这里，我们通过同时测量对齐的乙炔中的CC和CH键长，展示了从多原子分子中检索多个键长的方法。我们的方法超越了迄今为止已实现的简单双原子分子成像的方法，并且基于160 kHz中红外几周期激光源与完整的三维电子离子符合检测的结合。我们的技术为在复杂的气相分子中以亚秒级至飞秒级的时间分辨率成像超快过程提供了一种可访问且可靠的途径。