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A: Fachverband Atomphysik
A 20: Poster II
A 20.21: Poster
Wednesday, March 8, 2023, 16:30–19:00, Empore Lichthof
Engineering Inter-Layer Couplings in Thin-Film X-Ray Cavities — •Hanns Zimmermann1,2, Petar Andrejić3, and Adriana Pálffy2 — 1Universität der Bundeswehr München — 2Julius-Maximilians-Universität Würzburg — 3Friedrich-Alexander-Universität Erlangen-Nürnberg
The resonant interaction between x-rays and Mössbauer nuclei is a promising method for achieving quantum control of high-frequency photons. A particularly promising platform are thin-film cavities, with one or several embedded layers of resonant nuclei such as 57Fe with a Mössbauer transition at 14.4 keV. At grazing incidence, incoming x-rays couple evanescently to the cavity. In turn, the cavity field drives the nuclear transitions. The resulting nuclear response is well described by a recently-developed quantum-optical model based on the electromagnetic Green’s function [1,2].
Here, we investigate theoretically thin-film cavities with multiple 57Fe layers and design structures which allow for engineering of the inter-layer coupling. Via geometrical properties and control of the evanescent field pattern, we aim at implementing alternating coupling strengths between the resonant layers. Such couplings could lead to localization of the nuclear excitation in certain embedded layers and could eventually be useful to observe topological effects in x-ray thin-film cavities.
[1] X. Kong, et al. Phys. Rev. A 102, 033710 (2020)
[2] P. Andrejić and A. Pálffy, Phys. Rev. A 104, 033702 (2021)