Anti-bimeron in an asymmetric light field

Area of Science:

• Topological photonics
• Light field manipulation
• Optical quasiparticles

Background:

• Optical bimerons are topologically protected vector textures with potential in communication and information encoding.
• Traditional methods rely on symmetric light fields, limiting exploration of asymmetric topological states.

Purpose of the Study:

• To experimentally generate anti-bimerons using asymmetric light fields.
• To explore flexible construction and topological stability of bimeron textures.
• To investigate the role of asymmetry in modulating these structures.

Main Methods:

• Superposition of same-order asymmetric Laguerre-Gaussian (aLG) beams with conjugate complex shifts.
• Experimental generation of anti-bimerons.
• Analysis of spatial symmetry breaking and Gouy phase effects.

Main Results:

• Successful experimental generation of anti-bimerons.
• Demonstration of flexible bimeron texture construction across polarization bases.
• Confirmation of topological stability during propagation due to identical Gouy phases.
• Elucidation of asymmetry parameter's influence on robust structures.

Conclusions:

• This work expands the methods for generating optical quasiparticles.
• It provides a framework for utilizing light field asymmetry in topological information carriers.
• The findings pave the way for novel applications in communication and sensing.