Experimental Observation of Topological Transition in Optical Multimeron

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.