Preprint

PUBDB-2020-04918

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Disentangling X-ray dichroism and birefringence via high-purity polarimetry

Schmitt, A. (Corresponding author)Extern* ; Joly, Y.Extern* ; Schulze, K. S. ; Marx-Glowna, B.Extern* ; Uschmann, I.Extern* ; Grabiger, B.Extern* ; Bernhardt, H.Extern* ; Loetzsch, R.Extern* ; Juhin, A.Extern* ; Debray, J. ; Wille, H.-C.DESY* ; Yavas, H.Extern*DESY* ; Paulus, G.Extern* ; Röhlsberger, R. (Corresponding author)DESY*

2020
OSA Washington, DC

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Please use a persistent id in citations: doi:10.3204/PUBDB-2020-04918

Abstract: The advent of high-brilliance synchrotron radiation sources has opened new avenues for X-ray polarization analysis that go far beyond conventional polarimetry in the optical domain. With linear X-ray polarizers in a crossed setting remarkable polarization extinction ratios down to 10$^{-10}$ can be achieved. This renders the method sensitive to probe tiniest optical anisotropies that would occur, for example, in strong-field QED due to vacuum birefringence and dichroism. Here we show that high-purity polarimetry can be employed to reveal electronic anisotropies in condensed matter systems with utmost sensitivity and spectral resolution. Taking CuO and La$_2$CuO$_4$ as benchmark systems, we present a full characterization of the polarization changes across the Cu K-absorption edge and their separation into dichroic and birefringent contributions, supported by calculations via an ab-initio quantum code. Our results not only pave the way for the precision detection of symmetry breaking interactions in correlated materials. At the upcoming diffraction-limited synchrotron radiation sources and X-ray lasers, where polarization extinction ratios of 10$^{-12}$ can be achieved, our method has the potential to assess birefringence and dichroism of the quantum vacuum in fundamental studies of extreme electromagnetic fields.

Note: 6 pages, 4 figures, 8 pages supplemental material (4 figures)

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Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)
2. externe Institute im Bereich Photon Science (HI Jena)
3. Experimentebetreuung PETRA III (FS-PET-S)

Research Program(s):

1. 6212 - Quantum Condensed Matter: Magnetism, Superconductivity (POF3-621) (POF3-621)
2. 6G3 - PETRA III (POF3-622) (POF3-622)

Experiment(s):

1. PETRA Beamline P01 (PETRA III)

Appears in the scientific report 2020

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Database coverage:
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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Journal Article Schmitt, A. T.Extern* ; Joly, Y.Extern* ; Schulze, K. S.Extern*XFEL.EU* ; Marx-Glowna, B.XFEL.EU* ; Uschmann, I.Extern* ; Grabiger, B.Extern* ; Bernhardt, H.Extern* ; Loetzsch, R.Extern*XFEL.EU* ; Juhin, A.Extern* ; Debray, J. ; Wille, H.-C.XFEL.EU*DESY* ; Yavaş, H.Extern* ; Paulus, G. G.Extern* ; Röhlsberger, R. (Corresponding author)Extern*XFEL.EU*DESY*
Disentangling x-ray dichroism and birefringence via high-purity polarimetry
Optica 8(1), 56 - (2021) [10.1364/OPTICA.410357]2021     Files  Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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