Optical vortices provide a natural way to create topologies
New work suggests that building nontrivial topologies around optical vortices could be a better strategy than engineering delicate polarisation patterns across an entire beam The post Optical vortices provide a natural way to create topologies appeared first on Physics World .
Structured light, which refers to light with a designed spatial pattern, can be used to encode information and create topological field structures. However, these engineered patterns often degrade as the beam travels, limiting their practical applications. A team of researchers from Singapore and Spain have discovered a natural solution to this problem.
They found that the dark core of an optical vortex, where the electric field vanishes, forms a topological texture and defect that does not spread or degrade during propagation. This region, called a meronic spin defect, exhibits a tiny, ordered spin pattern around the central point where the spin vanishes. These defects remain confined to subwavelength scales and are more stable against turbulence than engineered structures.
While still a fundamental result, the discovery suggests that optical vortices could serve as exceptionally stable and compact building blocks for future structured-light technologies.
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