Nanophotonic devices based on magneto-optical materials: recent developments and applications.

Area of Science:

• Photonics
• Magnetism
• Nanotechnology

Background:

• Magneto-optical (MO) nanophotonic devices leverage light-magnetism interactions.
• Novel MO phenomena emerge in MO all-dielectric resonators and metasurfaces, distinct from bulk materials.

Purpose of the Study:

• To review recent developments in nanophotonic devices based on MO materials.
• To focus on various modes and MO effects in nanophotonic structures.
• To highlight new MO phenomena in magnetoplasmonics and all-dielectric nanostructures.

Main Methods:

• Review of recent literature on MO nanophotonic devices.
• Analysis of MO effects in all-dielectric resonators, metasurfaces, magnetoplasmonics, and nanostructures.
• Discussion of resonance modes like dark mode, Mie resonance, and waveguide mode.

Main Results:

• Observation of large s-polarized transverse MO Kerr effect at magnetic resonance wavelengths.
• Emergence of novel MO phenomena in nanophotonic structures not seen in bulk MO films.
• Demonstration of unique MO effects in magnetoplasmonics and all-dielectric nanostructures.

Conclusions:

• Nanophotonic devices based on MO materials exhibit unique MO phenomena.
• These structures enable applications in biological/chemical sensing and magnetic field sensing.
• Potential for magnetic field-controlled active and nonreciprocal metasurfaces.