Title: Collective nuclear excitation and pulse propagation in single-mode x-ray waveguides Show Chinese title

Title: 集体核激发与单模X射线波导中的脉冲传播

Abstract: Waveguides offer a means to controllably couple atomic ensembles to the electromagnetic field therein. Here, we demonstrate x-ray propagation in planar thin-film waveguides coupled to M\"ossbauer nuclei under collective resonant excitation by short pulses of synchrotron radiation. We record x-ray photons that have been emitted into resonant modes of the waveguide. Depending on the geometry and mode of excitation, two fundamentally different signatures of the collective emission are observed, for which we present a unifying theoretical model. Our results form a new platform for waveguide quantum electrodynamics in the hard x-ray regime with the potential to provide a coherent narrowband source of x-rays on the nanometer scale. Show Chinese abstract

Abstract: 波导提供了一种可控地耦合原子系综与其中电磁场的方法。 在这里，我们展示了在平面薄film波导中，通过同步辐射短脉冲集体共振激发的Mössbauer核耦合下的x射线传播。 我们记录了发射到波导共振模式中的x射线光子。 根据几何结构和激发模式的不同，观察到了两种本质上不同的集体发射特征，为此我们提出了一个统一的理论模型。 我们的结果为硬x射线范围内的波导量子电动力学提供了新的平台，并有可能在纳米尺度上提供相干窄带x射线源。