Abstract

Abstract Interaction between light and magnetism in magneto-optical (MO) nanophotonic devices has been actively studied in the past few years. The recent development of MO all-dielectric resonators and metasurfaces has led to the emergence of various novel MO phenomena that were not observed in their bulk counterparts. For example, a large s-polarized transverse MO Kerr effect can be observed at magnetic resonance wavelength, which cannot exist in the bare MO films. We review recent developments in nanophotonic devices based on MO materials and focus on different modes and related MO effects in nanophotonic structures with emphasis on recently discovered new MO phenomena in magnetoplasmonics and all-dielectric nanostructures, such as dark mode, all-dielectric Mie resonance and waveguide mode. Further, we discuss the potential applications of these nanostructures for biological/chemical sensing, magnetic field sensing, and magnetic field-controlled active and nonreciprocal metasurfaces.

Highlights

  • Faraday first studied the interaction between light and magnetism in 1845 [1] and Kerr studied it in magnetized materials in 1877, 1878 [2, 3]

  • We review recent developments in nanophotonic devices based on MO materials and focus on different modes and related MO effects in nanophotonic structures with emphasis on recently discovered new MO phenomena in magnetoplasmonics and all-dielectric nanostructures, such as dark mode, alldielectric Mie resonance and waveguide mode

  • We focus on different modes in MO nanophotonic devices with an emphasis on the recent development of novel magneto-nanophotonic structures and the observation of new MO effects in both magnetoplasmonic and all-dielectric MO nanostructures

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Summary

Introduction

Faraday first studied the interaction between light and magnetism in 1845 [1] and Kerr studied it in magnetized materials in 1877, 1878 [2, 3]. Given the development of nanophotonic devices, combining magnetic materials with subwavelength photonic nanostructures have become a promising field for enhancing MO effects, discovering novel MO effects, developing active metamaterials and metasurfaces, and enabling the efficient control of magnetism with light [22,23,24]. We focus on different modes in MO nanophotonic devices with an emphasis on the recent development of novel magneto-nanophotonic structures and the observation of new MO effects in both magnetoplasmonic and all-dielectric MO nanostructures. We discuss the recent development of magnetoplasmonic nanostructures, which features the observation of dark mode-induced strong MO effects, asymmetric/aperiodical plasmonic structures induced multiband MO effect enhancement, observation of optical gyromagnetism, and chiral magnetoplasmonic devices. We discuss the potential applications of these MO nanophotonic devices in chemical/biological sensing, magnetic field sensing, and magnetic field-controlled active and nonreciprocal metasurfaces

Summary of magneto-optical materials in this review
Magnetoplasmonics
All-dielectric MO subwavelength gratings
Mie resonance modes in all-dielectric MO resonators
Biosensing and chemical sensing
Magnetic field sensing
Magnetic field controlled active and nonreciprocal metasurfaces
Findings
Conclusions and perspectives
Full Text
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