High-harmonic spin-shearing interferometry for spatially resolved EUV magneto-optical spectroscopy

Brooks, Nathan J. (ORCID:000000017390878X); Dorney, Kevin M. (ORCID:0000000320976994); Ellis, Jennifer; Denton, Alexander E.; Gentry, Christian; Ryan, Sinéad A.; Nguyen, Quynh L. D.; Morrill, Drew W.; Kapteyn, Henry C. (ORCID:0000000183866317); Murnane, Margaret M.

doi:10.1364/oe.521669

DOE OSTI · 2349142

High-harmonic spin-shearing interferometry for spatially resolved EUV magneto-optical spectroscopy

Brooks, Nathan J. (ORCID:000000017390878X)·Dorney, Kevin M. (ORCID:0000000320976994)·Ellis, Jennifer·Denton, Alexander E.·Gentry, Christian·Ryan, Sinéad A.·Nguyen, Quynh L. D.·Morrill, Drew W.·Kapteyn, Henry C. (ORCID:0000000183866317)·Murnane, Margaret M.

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Abstract

We present a method for achieving hyperspectral magnetic imaging in the extreme ultraviolet (EUV) region based on high-harmonic generation (HHG). By interfering two mutually coherent orthogonally-polarized and laterally-sheared HHG sources, we create an EUV illumination beam with spatially-dependent ellipticity. By placing a magnetic sample in the beamline and sweeping the relative time delay between the two sources, we record a spatially resolved interferogram that is sensitive to the EUV magnetic circular dichroism of the sample. This image contains the spatially-resolved magneto-optical response of the sample at each harmonic order, and can be used to measure the magnetic properties of spatially inhomogeneous magnetic samples.

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Brooks, Nathan J. (ORCID:000000017390878X), Dorney, Kevin M. (ORCID:0000000320976994), Ellis, Jennifer, Denton, Alexander E., Gentry, Christian, Ryan, Sinéad A., Nguyen, Quynh L. D., Morrill, Drew W., Kapteyn, Henry C. (ORCID:0000000183866317), Murnane, Margaret M.. 2024-05-09. High-harmonic spin-shearing interferometry for spatially resolved EUV magneto-optical spectroscopy. https://doi.org/10.1364/oe.521669

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