Zayko, Sergey

[["dc.bibliographiccitation.artnumber","eaao4641"],["dc.bibliographiccitation.issue","12"],["dc.bibliographiccitation.journal","Science Advances"],["dc.bibliographiccitation.volume","3"],["dc.contributor.author","Kfir, Ofer"],["dc.contributor.author","Zayko, Sergey"],["dc.contributor.author","Nolte, Christina"],["dc.contributor.author","Sivis, Murat"],["dc.contributor.author","Möller, Marcel"],["dc.contributor.author","Hebler, Birgit"],["dc.contributor.author","Arekapudi, Sri Sai Phani Kanth"],["dc.contributor.author","Steil, Daniel"],["dc.contributor.author","Schäfer, Sascha"],["dc.contributor.author","Albrecht, Manfred"],["dc.contributor.author","Cohen, Oren"],["dc.contributor.author","Mathias, Stefan Dirk"],["dc.contributor.author","Ropers, Claus"],["dc.date.accessioned","2019-11-28T10:23:22Z"],["dc.date.available","2019-11-28T10:23:22Z"],["dc.date.issued","2017"],["dc.description.abstract","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 exceptional 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."],["dc.identifier.doi","10.1126/sciadv.aao4641"],["dc.identifier.pmid","29250601"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/62695"],["dc.language.iso","en"],["dc.relation.eissn","2375-2548"],["dc.relation.issn","2375-2548"],["dc.title","Nanoscale magnetic imaging using circularly polarized high-harmonic radiation"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","6337"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Nature Communications"],["dc.bibliographiccitation.volume","12"],["dc.contributor.author","Zayko, Sergey"],["dc.contributor.author","Kfir, Ofer"],["dc.contributor.author","Heigl, Michael"],["dc.contributor.author","Lohmann, Michael"],["dc.contributor.author","Sivis, Murat"],["dc.contributor.author","Albrecht, Manfred"],["dc.contributor.author","Ropers, Claus"],["dc.date.accessioned","2021-12-01T09:20:51Z"],["dc.date.available","2021-12-01T09:20:51Z"],["dc.date.issued","2021"],["dc.description.abstract","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."],["dc.description.sponsorship","Open-Access-Publikationsfonds 2022"],["dc.identifier.doi","10.1038/s41467-021-26594-0"],["dc.identifier.pii","26594"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/94287"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-478"],["dc.relation.eissn","2041-1723"],["dc.rights","CC BY 4.0"],["dc.title","Ultrafast high-harmonic nanoscopy of magnetization dynamics"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]