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

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...

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Bibliographic Details
Published in:Optics express 2024-05, Vol.32 (11), p.19076-19087
Main Authors: Brooks, Nathan J, Dorney, Kevin M, Ellis, Jennifer, Denton, Alexander E, Gentry, Christian, Ryan, Sinéad A, Nguyen, Quynh L D, Morrill, Drew W, Kapteyn, Henry C, Murnane, Margaret M
Format: Article
Language:English
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Summary: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.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.521669