Magneto-optical Kerr effect with twisted light beams: the origin of helicoidal dichroism in the reflection off magnetic vortices
In: Advances in Ultrafast Condensed Phase Physics III ; https://cnrs.hal.science/hal-03741786 ; Advances in Ultrafast Condensed Phase Physics III, Apr 2022, Strasbourg, France. pp.2, ⟨10.1117/12.2620539⟩ ; https://spie.org/epe/conferencedetails/ultrafast-condensed-phase-physics?SSO=1, 2022
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International audience ; Studying magnetization configurations of ever more complex magnetic structures has become a major challenge in the past decade, especially at ultrashort timescales. Most of current approaches are based on the analysis of polarization and magnetization-dependent reflectivity. We introduced a different concept, centered on the coupling of magnetic structures with light beams carrying orbital angular momentum (OAM), which was recently tested it in an experiment with magnetic vortices. Upon reflection by a magnetic vortex, an incoming beam with a well-defined OAM ℓ gets enriched in the neighboring OAM modes ℓ ± 1. It results in anisotropic far-field profiles, which leads to a magnetic helicoidal dichroism (MHD) signal. In this paper we provide a detailed analysis of MHD for the case of a magnetic vortex, providing an intuitive explanation in terms of transverse MOKE. The analysis of MHD allows to retrieve the complex magneto-optical constants. This method, which does not require any polarimetric measurement, is a new promising tool for the identification and analysis of magnetic configurations such as vortices, with a possible extension to the femtosecond to attosecond time resolution.
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Magneto-optical Kerr effect with twisted light beams: the origin of helicoidal dichroism in the reflection off magnetic vortices
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Autor/in / Beteiligte Person: | Luttmann, Martin ; Fanciulli, Mauro ; Pancaldi, Matteo ; Pedersoli, Emanuele ; Vimal, Mekha ; Bresteau, David ; Sacchi, Maurizio ; de Angelis, Dario ; Rebernik, Primoz ; Rösner, Benedikt ; Spezzani, Carlo ; Sousa, Ricardo ; Prejbeanu, Ioan-Lucian ; Vila, Laurent ; Dieny, Bernard ; de Ninno, Giovanni ; Ruchon, Thierry ; Capotondi, Flavio ; Laboratoire Interactions, Dynamiques et Lasers (ex SPAM) (LIDYL) ; Institut Rayonnement Matière de Saclay (DRF) (IRAMIS) ; Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Université Paris-Saclay ; (ATTO), Attophysique ; Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Université Paris-Saclay-Institut Rayonnement Matière de Saclay (DRF) (IRAMIS) ; Laboratoire de Physique des Matériaux et des Surfaces (LPMS) ; Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-CY Cergy Paris Université (CY) ; Elettra Sincrotrone Trieste ; Croissance et propriétés de systèmes hybrides en couches minces (INSP-E8) ; Institut des Nanosciences de Paris (INSP) ; Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) ; Synchrotron SOLEIL (SSOLEIL) ; Centre National de la Recherche Scientifique (CNRS) ; Paul Scherrer Institute (PSI) ; SPINtronique et TEchnologie des Composants (SPINTEC) ; Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche Interdisciplinaire de Grenoble (IRIG) ; Direction de Recherche Fondamentale (CEA) (DRF (CEA)) ; Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) ; Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes (UGA) ; University of Nova Gorica |
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Zeitschrift: | Advances in Ultrafast Condensed Phase Physics III ; https://cnrs.hal.science/hal-03741786 ; Advances in Ultrafast Condensed Phase Physics III, Apr 2022, Strasbourg, France. pp.2, ⟨10.1117/12.2620539⟩ ; https://spie.org/epe/conferencedetails/ultrafast-condensed-phase-physics?SSO=1, 2022 |
Veröffentlichung: | HAL CCSD ; SPIE, 2022 |
Medientyp: | Konferenz |
DOI: | 10.1117/12.2620539 |
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