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Journal Articles Journal of Physics D: Applied Physics Year : 2022

The 2022 Magneto-Optics Roadmap

1 Radboud University [Nijmegen]
2 GPI - A. M. Prokhorov General Physics Institute
3 MBI - Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie
4 DIPC - Donostia International Physics Center
5 IMN-Instituto de Micro y Nanotecnología (CNM-CSIC), Isaac Newton 8, PTM, 28760 Tres Cantos, Madrid, Spain
6 Institute of Physics, University of Technology Chemnitz
7 Institute of Physics of Charles University, Faculty of Mathematics and Physics
8 Institut für Materialwissenschaft Universität Kiel
9 UNIPG - Università degli Studi di Perugia = University of Perugia
10 D-MATL - Department of Materials [ETH Zürich]
11 IBM Research [Zurich]
12 Institut für Physik [Greifswald]
13 TU Graz - Graz University of Technology [Graz]
14 LSI - Laboratoire des Solides Irradiés - Irradiated Solids Laboratory
15 Chelyabinsk State University
16 Syktyvkar State University
17 Umeå University
18 Physics and Materials Science Research Unit, University of Luxembourg
19 Russian Quantum Center
20 Faculty of Physics, Lomonosov Moscow State University
21 CPfS - Max Planck Institute for Chemical Physics of Solids
22 Universidad de Oviedo [Oviedo]
23 CINN - Nanomaterials and Nanotechnology Research Center
24 Institute for Solid State Physics, The University of Tokyo, Kashiwa 277-8581, Japan
25 LIDYL - Laboratoire Interactions, Dynamiques et Lasers (ex SPAM)
26 ATTO - Attophysique
27 LPMS - Laboratoire de Physique des Matériaux et des Surfaces
28 INSP-E8 - Croissance et propriétés de systèmes hybrides en couches minces
29 SSOLEIL - Synchrotron SOLEIL
30 UC San Diego - University of California [San Diego]
31 Center for Memory and Recording Research
32 JHU - Johns Hopkins University
33 University of Nebraska–Lincoln
34 Department of Physics, Chemistry and Biology, Linköping University
35 Skane University Hospital [Lund]
36 Shenzhen Key Laboratory on Power Battery Safety and Shenzhen Geim Graphene Center
37 SIAT - Shenzhen Institute of Advanced Technology [Shenzhen]
39 Ikerbasque - Basque Foundation for Science
Gian Salis
  • Function : Author
Andreas Berger


Magneto-optical effects, viz. magnetically induced changes in light intensity or polarization upon reflection from or transmission through a magnetic sample, were discovered over a century and a half ago. Initially they played a crucially relevant role in unveiling the fundamentals of electromagnetism and quantum mechanics. A more broad-based relevance and wide-spread use of magneto-optical methods, however, remained quite limited until the 1960s due to a lack of suitable, reliable and easy- to-operate light sources. The advent of Laser technology and the availability of other novel light sources led to an enormous expansion of magneto-optical measurement techniques and applications that continues to this day (see Section 1). The here-assembled roadmap article is intended to provide a meaningful survey over many of the most relevant recent developments, advances, and emerging research directions in a rather condensed form, so that readers can easily access a significant overview about this very dynamic research field. While light source technology and other experimental developments were crucial in the establishment of today’s magneto-optics, progress also relies on an ever-increasing theoretical understanding of magneto-optical effects from a quantum mechanical perspective (see Section 2), as well as using electromagnetic theory and modelling approaches (see Section 3) to enable quantitatively reliable predictions for ever more complex materials, metamaterials, and device geometries. The latest advances in established magneto-optical methodologies and especially the utilization of the magneto-optical Kerr effect (MOKE) are presented in effect in 2D materials). In addition, magneto-optical effects are now being investigated and utilized in spectral ranges, to which they originally seemed completely foreign, as those of synchrotron radiation X-rays (see Section 14 on 3D magnetic characterization and Section 16 on light beams carrying orbital angular momentum) and, very recently, the terahertz regime (see Section 18 on THz MOKE and Section 19 on THz ellipsometry for electron paramagnetic resonance detection). Magneto-optics also demonstrates its strength in a unique way when combined with femtosecond laser pulses (see Section 10 on ultrafast MOKE and Section 15 on magneto-optics using X-ray free electron lasers), facilitating the very active field of time- resolved magneto-optical spectroscopy that enables investigations of phenomena like spin relaxation of nonequilibrium photoexcited carriers, transient modifications of ferromagnetic order, and photo- induced dynamic phase transitions, to name a few. Recent progress in nanoscience and nanotechnology, which is intimately linked to the achieved impressive ability to reliably fabricate materials and functional structures at the nanoscale, now enables the exploitation of strongly enhanced magneto-optical effects induced by light-matter interaction at the nanoscale (see Section 12 on magnetoplasmonics and Section 13 on magneto- optical metasurfaces). Magneto-optical effects are also at the very heart of powerful magnetic characterization techniques like Brillouin light scattering and time-resolved pump-probe measurements for the study of spin waves (see Section 7), their interactions with acoustic waves (see Section 11), and ultra-sensitive magnetic field sensing applications based on Nitrogen-vacancy centers in diamond (see Section 17). Despite our best attempt to represent the field of magneto-optics accurately and do justice to all its novel developments and its diversity, the research area is so extensive and active that there remains great latitude in deciding what to include in an article of this sort, which in turn means that some areas might not be adequately represented here. However, we feel that the 20 sections that form this 2022 Magneto-Optics Roadmap article, each written by experts in the field and addressing a specific subject on only two pages, provide an accurate snapshot of where this research field stands today. Correspondingly, it should act as a valuable reference point and guideline for emerging research directions in modern magneto-optics, as well as illustrate the directions this research field might take in the foreseeable future.
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Dates and versions

hal-03765500 , version 1 (31-08-2022)



Alexey Kimel, Anatoly Zvezdin, Sangeeta Sharma, Samuel Shallcross, Nuno De Sousa, et al.. The 2022 Magneto-Optics Roadmap. Journal of Physics D: Applied Physics, 2022, ⟨10.1088/1361-6463/ac8da0⟩. ⟨hal-03765500⟩
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