Collective nuclear excitation and pulse propagation in single-mode x-ray waveguides

• URL: http://arxiv.org/abs/2403.06508v3
• Date: Wed, 16 Apr 2025 07:51:35 GMT
• Title: Collective nuclear excitation and pulse propagation in single-mode x-ray waveguides
• Authors: Leon M. Lohse, Petar Andrejić, Sven Velten, Malte Vassholz, Charlotte Neuhaus, Ankita Negi, Anjali Panchwanee, Ilya Sergeev, Adriana Pálffy, Tim Salditt, Ralf Röhlsberger,
• Abstract summary: We demonstrate x-ray propagation in planar thin-film waveguides coupled to M"ossbauer nuclei under collective excitation by short pulses of synchrotron radiation.<n>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.
• Score: 0.0
• License: http://creativecommons.org/licenses/by-sa/4.0/
• 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.

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