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Optomagnetism with a plasmonic skyrmion.

Vage Karakhanyan, Thierry Grosjean

|June 14, 2024

Summary

Researchers explored how plasmonic Neel skyrmions generate optomagnetism in gold films. Focused vortex beams optimize this effect, enabling new applications in all-optical magnetization switching and magnetic recording.

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Area of Science:

Optics and Magnetism
Plasmonics
Spintronics

Background:

Optical waves can induce ultrafast magnetism.
Magnetic skyrmions are analogs of magnetic states with potential for novel spin-optical states.

Purpose of the Study:

To investigate the creation of an optomagnetic field using plasmonic Neel skyrmions in a thin gold film.
To determine the optimal conditions for generating optomagnetism via plasmonic skyrmions.

Main Methods:

Generation of plasmonic Neel skyrmions using a focused radially polarized vortex beam (RPVB).
Experimental and theoretical analysis of the induced optomagnetic field in a thin gold film.

Main Results:

Plasmionic Neel skyrmions effectively create an opto-induced stationary magnetic field.
A focused RPVB is optimal for generating optomagnetism with plasmonic Neel skyrmions in gold films.

Conclusions:

Optical skyrmions provide enhanced control over optomagnetism in plasmonic nanostructures.
This research has direct applications in all-optical magnetization switching, magnetic recording, and spin wave excitation.

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