TY  - JOUR
AU  - Lohse, Leon M.
AU  - Andrejić, Petar
AU  - Velten, Sven
AU  - Vassholz, Malte
AU  - Neuhaus, Charlotte
AU  - Negi, Ankita
AU  - Panchwanee, Anjali
AU  - Sergeev, Ilya
AU  - Pálffy, Adriana
AU  - Salditt, Tim
AU  - Röhlsberger, Ralf
TI  - Collective Nuclear Excitation and Pulse Propagation in Single-Mode X-Ray Waveguides
JO  - Physical review letters
VL  - 135
IS  - 5
SN  - 0031-9007
CY  - College Park, Md.
PB  - APS
M1  - PUBDB-2025-03851
M1  - arXiv:2403.06508
SP  - 053601
PY  - 2025
AB  - 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 Mössbauer 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 narrow band source of x-rays on the nanometer scale.
LB  - PUB:(DE-HGF)16
C6  - pmid:40824784
DO  - DOI:10.1103/r2hf-9qn9
UR  - https://bib-pubdb1.desy.de/record/637443
ER  -