New Device Creates Switchable Light Skyrmions

A groundbreaking optical device has been engineered to generate two unique, stable vortex-shaped light patterns known as skyrmions. These patterns, one electric and one magnetic, are remarkably resilient and maintain their integrity even when subjected to interference. This stability makes them highly attractive for encoding information in upcoming wireless communication technologies.

The research team successfully demonstrated the active switching between electric and magnetic configurations within toroidal terahertz light pulses. This control is achieved using a nonlinear metasurface, an ultra-thin material patterned at the nanoscale. The device allows for on-demand switching between modes using a single integrated platform, a critical capability for reliable information encoding.

Terahertz waves are gaining traction for next-generation communication and sensing. This innovation advances the development of programmable terahertz light structures, moving beyond simple emission to shaping pulses for practical use. The ability to toggle between distinct topological light states offers potential for more robust information encoding and light-based circuits.