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High-harmonic spin-shearing interferometry for spatially resolved EUV magneto-optical spectroscopy.
Optics Express
|June 11, 2024
Summary
We developed a new technique for hyperspectral magnetic imaging in the extreme ultraviolet (EUV) region using high-harmonic generation (HHG). This method enables detailed measurement of magnetic properties in inhomogeneous samples.
Area of Science:
- Optics and Photonics
- Materials Science
- Magnetism
Background:
- High-harmonic generation (HHG) is a key process for producing extreme ultraviolet (EUV) radiation.
- Understanding magnetic properties of materials at the nanoscale is crucial for technological advancements.
Purpose of the Study:
- To develop a novel method for hyperspectral magnetic imaging in the EUV region.
- To enable spatially resolved measurements of magnetic properties in inhomogeneous samples.
Main Methods:
- Generating two mutually coherent, orthogonally-polarized, and laterally-sheared HHG sources.
- Creating an EUV illumination beam with spatially dependent ellipticity.
- Recording spatially resolved interferograms sensitive to EUV magnetic circular dichroism by sweeping time delay.
Main Results:
- Achieved hyperspectral magnetic imaging in the EUV region.
- Demonstrated sensitivity to the EUV magnetic circular dichroism of a sample.
- Obtained spatially resolved magneto-optical response at each harmonic order.
Conclusions:
- The presented method allows for detailed characterization of magnetic properties in spatially inhomogeneous samples.
- This technique opens new avenues for investigating nanoscale magnetism.
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