Note: Soft X-ray transmission polarizer based on ferromagnetic thin films

A transmission polarizer for producing elliptically polarized soft X-ray radiation from linearly polarized light is presented. The setup is intended for use at synchrotron and free-electron laser beamlines that do not directly offer circularly polarized light for, e.g., X-ray magnetic circular dichr...

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Veröffentlicht in:Review of scientific instruments 2018-03, Vol.89 (3), p.036103-036103
Hauptverfasser: Müller, L., Hartmann, G., Schleitzer, S., Berntsen, M. H., Walther, M., Rysov, R., Roseker, W., Scholz, F., Seltmann, J., Glaser, L., Viefhaus, J., Mertens, K., Bagschik, K., Frömter, R., De Fanis, A., Shevchuk, I., Medjanik, K., Öhrwall, G., Oepen, H. P., Martins, M., Meyer, M., Grübel, G.
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Sprache:eng
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Zusammenfassung:A transmission polarizer for producing elliptically polarized soft X-ray radiation from linearly polarized light is presented. The setup is intended for use at synchrotron and free-electron laser beamlines that do not directly offer circularly polarized light for, e.g., X-ray magnetic circular dichroism (XMCD) measurements or holographic imaging. Here, we investigate the degree of ellipticity upon transmission of linearly polarized radiation through a cobalt thin film. The experiment was performed at a photon energy resonant to the Co L3-edge, i.e., 778 eV, and the polarization of the transmitted radiation was determined using a polarization analyzer that measures the directional dependence of photo electrons emitted from a gas target. Elliptically polarized radiation can be created at any absorption edge showing the XMCD effect by using the respective magnetic element.
ISSN:0034-6748
1089-7623
1089-7623
DOI:10.1063/1.5018396