تقرير
Disentangling X-ray dichroism and birefringence via high-purity polarimetry
| العنوان: | Disentangling X-ray dichroism and birefringence via high-purity polarimetry |
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| المؤلفون: | Schmitt, Annika T., Joly, Yves, Schulze, Kai S., Marx-Glowna, Berit, Uschmann, Ingo, Grabiger, Benjamin, Bernhardt, Hendrik, Loetzsch, Robert, Juhin, Amélie, Debray, Jérôme, Wille, Hans-Christian, Yavaş, Hasan, Paulus, Gerhard G., Röhlsberger, Ralf |
| المصدر: | Optica 8 (2021) 56-61 |
| سنة النشر: | 2020 |
| المجموعة: | Physics (Other) |
| مصطلحات موضوعية: | Physics - Instrumentation and Detectors, Physics - Optics |
| الوصف: | High-brilliance synchrotron radiation sources have 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 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. At 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 extreme electromagnetic fields. Comment: 10 pages, 4 figures, 13 pages supplemental material (4 figures) |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1364/OPTICA.410357 |
| URL الوصول: | http://arxiv.org/abs/2003.00849 |
| رقم الأكسشن: | edsarx.2003.00849 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1364/OPTICA.410357 |
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