The COMIX polarimeter: a compact device for XUV polarization analysis

We report on the characterization of a novel extreme‐ultraviolet polarimeter based on conical mirrors to simultaneously detect all the components of the electric field vector for extreme‐ultraviolet radiation in the 45–90 eV energy range. The device has been characterized using a variable polarizati...

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Bibliographic Details
Published in:Journal of synchrotron radiation 2022-07, Vol.29 (4), p.969-977
Main Authors: Pancaldi, Matteo, Strüber, Christian, Friedrich, Bertram, Pedersoli, Emanuele, De Angelis, Dario, Nikolov, Ivaylo P., Manfredda, Michele, Foglia, Laura, Yulin, Sergiy, Spezzani, Carlo, Sacchi, Maurizio, Eisebitt, Stefan, von Korff Schmising, Clemens, Capotondi, Flavio
Format: Article
Language:English
Subjects:
Condensed Matter
Electric fields
extreme-ultraviolet polarimetry
free-electron laser
magnetic materials
Materials Science
Physics
Polarimeters
Polarization
pump–probe experiments
Research Papers
Synchrotrons
Thin films
Ultraviolet radiation
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Summary:We report on the characterization of a novel extreme‐ultraviolet polarimeter based on conical mirrors to simultaneously detect all the components of the electric field vector for extreme‐ultraviolet radiation in the 45–90 eV energy range. The device has been characterized using a variable polarization source at the Elettra synchrotron, showing good performance in the ability to determine the radiation polarization. Furthermore, as a possible application of the device, Faraday spectroscopy and time‐resolved experiments have been performed at the Fe M2,3‐edge on an FeGd ferrimagnetic thin film using the FERMI free‐electron laser source. The instrument is shown to be able to detect the small angular variation induced by an optical external stimulus on the polarization state of the light after interaction with magnetic thin film, making the device an appealing tool for magnetization dynamics research. The COMIX instrument, a novel compact polarimeter for XUV light based on conical mirrors, has been tested and characterized. Through a time‐resolved experiment on a ferrimagnetic thin film, it is shown that the device has the potential to become a versatile tool for research in femtomagnetism.
ISSN:1600-5775
0909-0495
1600-5775
DOI:10.1107/S1600577522004027