SAMOP 2023 – scientific programme

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A: Fachverband Atomphysik

A 20: Poster II

A 20.12: Poster

Wednesday, March 8, 2023, 16:30–19:00, Empore Lichthof

Dynamically-controllable resonant x-ray optics via mechanically-induced refractive-index control — •Miriam Gerharz¹, Dominik Lentrodt^1,2,3, Lars Bocklage⁴, Kai Schlage⁴, Kai Schulze^5,6, Christian Ott¹, Lukas Wolff¹, René Steinbrügge⁴, Olaf Leupold⁴, Ilya Sergeev⁴, Gerhard Paulus^5,6, Christoph H. Keitel¹, Ralf Röhlsberger^4,5,6, Thomas Pfeifer¹, and Jörg Evers¹ — ¹Max-Planck-Institut für Kernphysik, Heidelberg, Germany — ²Physikalisches Institut, Freiburg, Germany — ³EUCOR Centre for Quantum Science and Quantum Computing, Freiburg, Germany — ⁴Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany — ⁵Helmholtz-Institut Jena, Jena, Germany — ⁶Institut für Optik und Quantenelektronik, Jena, Germany

In this project we introduce a concept for dynamically-controllable resonant x-ray optics. Using piezo-control methods, we can displace a solid-state target much faster than the lifetime of its resonances. This creates a mechanically-induced phase shift, which can be associated with a frequency-dependent effective refractive index n(ω) of the moving target. Hence, we can achieve polarization control by mechanically-induced birefringence. We theoretically and experimentally demonstrate the approach with a x-ray polarization interferometer, in which the interference is controlled by the mechanically-induced refractive-index control. This setup can be used for temporal gating and provides a sensitive tool for a noise background analysis on sub-Ångstrom level.