A laser aimed at a tiny circular disc let NTU researchers generate optical skyrmions without the metamaterials and specialized setups usually required, according to a study published in Optica.
The method revives the 200-year-old Poisson spot effect, where diffraction creates a bright point in a disc's shadow, turning a classic optics experiment into a simpler platform for producing and controlling topological light structures.
Four related skyrmion forms appeared in the same light field—spin, Stokes, electric-field and magnetic-field skyrmions—giving researchers a way to compare how different light properties evolve and interact together.
Because optical skyrmions are stable patterns that could encode information, the lower-cost setup could widen research into photonics, data storage, communications and next-generation computing.
Can a 200-year-old physics trick using a simple laser truly challenge advanced materials in the race for next-generation data storage?
If a forgotten experiment can unlock future computing, what other major breakthroughs are hidden inside old physics textbooks?
Revolutionizing Photonics: Low-Cost Poisson Spot Technique Produces Multiple Optical Skyrmions for Next-Gen Data and Communications
Overview
A team led by Assistant Professor Shen Yijie at NTU Singapore has made a major breakthrough by using the simple Poisson spot phenomenon to generate four types of optical skyrmions—spin, Stokes, electric-field, and magnetic-field—simultaneously within a single light spot. Their method, which only requires shining a laser on a small circular disk, makes advanced skyrmion research much more accessible. This achievement, published in Optica, marks a pivotal moment in photonics, opening new opportunities for technological innovation and lowering barriers for researchers to explore and use these complex light structures.