Zayko, Sergey

[["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","JPhys Photonics"],["dc.bibliographiccitation.volume","2"],["dc.contributor.affiliation","Bordo, Eliyahu;"],["dc.contributor.affiliation","Kfir, Ofer;"],["dc.contributor.affiliation","Zayko, Sergey;"],["dc.contributor.affiliation","Neufeld, Ofer;"],["dc.contributor.affiliation","Fleischer, Avner;"],["dc.contributor.affiliation","Ropers, Claus;"],["dc.contributor.affiliation","Cohen, Oren;"],["dc.contributor.author","Bordo, Eliyahu"],["dc.contributor.author","Kfir, Ofer"],["dc.contributor.author","Neufeld, Ofer"],["dc.contributor.author","Fleischer, Avnerf"],["dc.contributor.author","Ropers, Claus"],["dc.contributor.author","Cohen, Oren"],["dc.contributor.author","Zayko, Sergey"],["dc.date.accessioned","2020-05-29T09:51:02Z"],["dc.date.available","2020-05-29T09:51:02Z"],["dc.date.issued","2020"],["dc.date.updated","2022-02-09T13:18:44Z"],["dc.description.abstract","AbstractThe ellipticity of high harmonics driven by bi-chromatic (e.g. ω−2ω) co-propagating fields can be fully tuned by varying the polarization of the pump components. In order to start revealing the underlying mechanism of this control, we explore a relatively simple regime of this scheme that still gives rise to full control over the harmonics ellipticities. In this regime, the pumps are only slightly elliptical and the high harmonic radiation consists of two (different) interlocked attosecond pulse trains (APTs). We formulate a semi-analytic model that maps the high harmonic ellipticity to properties of the APTs harmonic decompositions. Utilizing this model, we reconstruct these APTs variables from measurements of the high harmonics ellipticities. This ellipticity-resolved spectroscopy of interlocked APTs may be useful for ultrafast probing of chiral degrees of freedom."],["dc.identifier.doi","10.1088/2515-7647/ab8a5c"],["dc.identifier.eissn","2515-7647"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/66019"],["dc.language.iso","en"],["dc.publisher","IOP Publishing"],["dc.relation.issn","2515-7647"],["dc.rights.uri","http://creativecommons.org/licenses/by/4.0"],["dc.title","Interlocked attosecond pulse trains in slightly bi-elliptical high harmonic generation"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["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"]]