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Ultrafast high-harmonic nanoscopy of magnetization dynamics

Light-induced magnetization changes, such as all-optical switching, skyrmion nucleation, and intersite spin transfer, unfold on temporal and spatial scales down to femtoseconds and nanometers, respectively. Pump-probe spectroscopy and diffraction studies indicate that spatio-temporal dynamics may dr...

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Autores principales: Zayko, Sergey, Kfir, Ofer, Heigl, Michael, Lohmann, Michael, Sivis, Murat, Albrecht, Manfred, Ropers, Claus
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8566501/
https://www.ncbi.nlm.nih.gov/pubmed/34732725
http://dx.doi.org/10.1038/s41467-021-26594-0
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author Zayko, Sergey
Kfir, Ofer
Heigl, Michael
Lohmann, Michael
Sivis, Murat
Albrecht, Manfred
Ropers, Claus
author_facet Zayko, Sergey
Kfir, Ofer
Heigl, Michael
Lohmann, Michael
Sivis, Murat
Albrecht, Manfred
Ropers, Claus
author_sort Zayko, Sergey
collection PubMed
description Light-induced magnetization changes, such as all-optical switching, skyrmion nucleation, and intersite spin transfer, unfold on temporal and spatial scales down to femtoseconds and nanometers, respectively. Pump-probe spectroscopy and diffraction studies indicate that spatio-temporal dynamics may drastically affect the non-equilibrium magnetic evolution. Yet, direct real-space magnetic imaging on the relevant timescales has remained challenging. Here, we demonstrate ultrafast high-harmonic nanoscopy employing circularly polarized high-harmonic radiation for real-space imaging of femtosecond magnetization dynamics. We map quenched magnetic domains and localized spin structures in Co/Pd multilayers with a sub-wavelength spatial resolution down to 16 nm, and strobosocopically trace the local magnetization dynamics with 40 fs temporal resolution. Our compact experimental setup demonstrates the highest spatio-temporal resolution of magneto-optical imaging to date. Facilitating ultrafast imaging with high sensitivity to chiral and linear dichroism, we envisage a wide range of applications spanning magnetism, phase transitions, and carrier dynamics.
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spelling pubmed-85665012021-11-19 Ultrafast high-harmonic nanoscopy of magnetization dynamics Zayko, Sergey Kfir, Ofer Heigl, Michael Lohmann, Michael Sivis, Murat Albrecht, Manfred Ropers, Claus Nat Commun Article Light-induced magnetization changes, such as all-optical switching, skyrmion nucleation, and intersite spin transfer, unfold on temporal and spatial scales down to femtoseconds and nanometers, respectively. Pump-probe spectroscopy and diffraction studies indicate that spatio-temporal dynamics may drastically affect the non-equilibrium magnetic evolution. Yet, direct real-space magnetic imaging on the relevant timescales has remained challenging. Here, we demonstrate ultrafast high-harmonic nanoscopy employing circularly polarized high-harmonic radiation for real-space imaging of femtosecond magnetization dynamics. We map quenched magnetic domains and localized spin structures in Co/Pd multilayers with a sub-wavelength spatial resolution down to 16 nm, and strobosocopically trace the local magnetization dynamics with 40 fs temporal resolution. Our compact experimental setup demonstrates the highest spatio-temporal resolution of magneto-optical imaging to date. Facilitating ultrafast imaging with high sensitivity to chiral and linear dichroism, we envisage a wide range of applications spanning magnetism, phase transitions, and carrier dynamics. Nature Publishing Group UK 2021-11-03 /pmc/articles/PMC8566501/ /pubmed/34732725 http://dx.doi.org/10.1038/s41467-021-26594-0 Text en © The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Zayko, Sergey
Kfir, Ofer
Heigl, Michael
Lohmann, Michael
Sivis, Murat
Albrecht, Manfred
Ropers, Claus
Ultrafast high-harmonic nanoscopy of magnetization dynamics
title Ultrafast high-harmonic nanoscopy of magnetization dynamics
title_full Ultrafast high-harmonic nanoscopy of magnetization dynamics
title_fullStr Ultrafast high-harmonic nanoscopy of magnetization dynamics
title_full_unstemmed Ultrafast high-harmonic nanoscopy of magnetization dynamics
title_short Ultrafast high-harmonic nanoscopy of magnetization dynamics
title_sort ultrafast high-harmonic nanoscopy of magnetization dynamics
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8566501/
https://www.ncbi.nlm.nih.gov/pubmed/34732725
http://dx.doi.org/10.1038/s41467-021-26594-0
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