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

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Experimental Observation of Topological Transition in Optical Multimeron.

Yuanhao Lang¹, Quan Xu¹, Fan Huang¹

¹Center for Terahertz Waves, State Key Laboratory of Precision Measurement Technology and Instruments, Tianjin University, Tianjin, 300072, China.

Advanced Materials (Deerfield Beach, Fla.)

|October 17, 2025

Summary

This summary is machine-generated.

Researchers demonstrate dynamic control over optical spin multimerons by tuning incident light topology. This breakthrough enables topological transitions and skyrmion number swaps in optical systems.

Keywords:

plasmonic vortex topological texture topological transition

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Area of Science:

Optics and Photonics
Topological Physics
Materials Science

Background:

Topological textures, like skyrmion-like structures, are observed in various optical systems.
Magnetic skyrmions offer tunable topological features for advanced devices.
Dynamic control over optical topological transitions remains a significant challenge.

Purpose of the Study:

To propose and demonstrate a platform for generating optical spin multimerons.
To achieve dynamic manipulation of multimeron topology.
To observe topological transitions in optical systems.

Main Methods:

Utilizing multiple plasmonic vortex interference to create optical spin multimerons.
Tuning the topology of incident light to manipulate multimeron topology.
Experimental observation of topological transitions and skyrmion number swaps.

Main Results:

Successful generation of optical spin multimerons.
Demonstrated dynamic control over multimeron topology via incident light manipulation.
Experimentally observed a nontrivial topological transition with a skyrmion number swap.

Conclusions:

The proposed platform enables the formation and manipulation of optical spin multimerons.
This work provides insights into the formation and transition mechanisms of optical topological textures.
The findings broaden the scope of optical quasiparticles and their potential applications.