This work demonstrates nanoscale magnetic imaging using bright circularly polarized high-harmonic radiation. We utilize the magneto-optical contrast of worm-like magnetic domains in a Co/Pd multilayer structure, obtaining quantitative amplitude and phase maps by lensless imaging. A diffraction-limited spatial resolution of 49 nm is achieved with iterative phase reconstruction enhanced by a holographic mask. Harnessing the unique coherence of high harmonics, this approach will facilitate quantitative, element-specific and spatially-resolved studies of ultrafast magnetization dynamics, advancing both fundamental and applied aspects of nanoscale magnetism.
@article{arxiv.1706.07695,
title = {Nanoscale Magnetic Imaging using Circularly Polarized High-Harmonic Radiation},
author = {Ofer Kfir and Sergey Zayko and Christina Nolte and Murat Sivis and Marcel Möller and Birgit Hebler and Sri Sai Phani Kanth Arekapudi and Daniel Steil and Sascha Schäfer and Manfred Albrecht and Oren Cohen and Stefan Mathias and Claus Ropers},
journal= {arXiv preprint arXiv:1706.07695},
year = {2017}
}
Comments
Ofer Kfir and Sergey Zayko contributed equally to this work. Presented in CLEO 2017 (Oral) doi.org/10.1364/CLEO_QELS.2017.FW1H.8