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Nanoscale magnetic imaging using circularly polarized high-harmonic radiation
Ofer Kfir1,2, Sergey Zayko1, Christina Nolte3
14th Physical Institute, University of Göttingen, Göttingen 37077, Germany.
Science Advances
|December 19, 2017
Summary
This study presents nanoscale magnetic imaging using bright circularly polarized high-harmonic radiation. The technique achieves 49 nm resolution for quantitative magnetic domain mapping, advancing ultrafast magnetization dynamics research.
Area of Science:
- Physics
- Materials Science
- Nanotechnology
Background:
- Nanoscale magnetism is crucial for advanced technologies.
- Current imaging techniques face limitations in resolution and quantitative analysis.
- Understanding ultrafast magnetization dynamics is key to developing next-generation magnetic devices.
Purpose of the Study:
- To demonstrate nanoscale magnetic imaging using circularly polarized high-harmonic radiation.
- To achieve quantitative amplitude and phase mapping of magnetic domains.
- To advance the study of ultrafast magnetization dynamics at the nanoscale.
Main Methods:
- Utilized bright circularly polarized high-harmonic radiation.
- Employed lensless imaging with magneto-optical contrast of Co/Pd multilayer magnetic domains.
- Achieved diffraction-limited spatial resolution of 49 nm via iterative phase reconstruction and a holographic mask.
Main Results:
- Successfully obtained quantitative amplitude and phase maps of magnetic domains.
- Demonstrated a spatial resolution of 49 nm.
- Showcased the potential for high-resolution nanoscale magnetic imaging.
Conclusions:
- The developed method enables quantitative, element-specific, and spatially resolved studies of ultrafast magnetization dynamics.
- This approach significantly advances fundamental and applied nanoscale magnetism.
- High-harmonic radiation offers a promising tool for high-resolution magnetic imaging.
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