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Potential Due to a Magnetized Object

Potential Due to a Magnetized Object

Magnetic dipoles in magnetic materials are aligned when placed under an external magnetic field. For paramagnets and ferromagnets, dipole alignment occurs in the direction of the magnetic field. However, the dipoles align opposite to the field in the case of diamagnets. This state of magnetic polarization due to the external field is called magnetization. Magnetization is defined as the dipole moment per unit volume. It plays a similar role to polarization in electrostatics.
The vector...

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Updated: Apr 20, 2026

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures

Published on: November 21, 2019

Magnetoplasmonic design rules for active magneto-optics.

Kristof Lodewijks¹, Nicolò Maccaferri, Tavakol Pakizeh

¹Department of Applied Physics, Chalmers University of Technology , 41296 Gothenburg, Sweden.

|November 26, 2014

Summary

This summary is machine-generated.

Researchers developed tunable nanoscale magnetoplasmonic devices for light polarization control. These elements offer tailored amplitude and sign of the Kerr response, advancing miniaturized optical isolators and rotators.

Keywords:

Kerr response Photonics magneto-optics magnetoplasmonics

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Area of Science:

Photonics and Nanotechnology
Magneto-optics and Plasmonics

Background:

Macroscopic polarization rotators and optical isolators are crucial in photonics.
Current devices rely on bulk magneto-optical effects like Faraday and Kerr rotation.
There is a need for miniaturized, tunable versions of these essential optical components.

Purpose of the Study:

To introduce design rules for active magnetoplasmonic elements.
To enable nanoscale realization of polarization control devices.
To achieve tunable amplitude and sign of the Kerr response.

Main Methods:

Integration of magnetic and plasmonic functionalities.
Development of design principles for magnetoplasmonic nanostructures.
Characterization of tunable Kerr response over a broad spectral range.

Main Results:

Demonstrated highly tunable active magnetoplasmonic elements.
Showcased the ability to tailor the Kerr response amplitude and sign.
Established a pathway for nanoscale magneto-optical devices.

Conclusions:

Magnetoplasmonics offers a viable route to nanoscale polarization control.
The introduced design rules facilitate the development of tunable active nanodevices.
This work advances the integration of magnetism and plasmonics for future photonic technologies.