Laser Light Rewrites Magnetism in Breakthrough Quantum Material

Laser Light Rewrites Magnetism in Breakthrough Quantum Material

Scientists have demonstrated that light alone can reversibly control magnetism in a topological material. Researchers at the University of Basel and ETH Zurich have found a way to flip the magnetic polarity of an unusual ferromagnet using a laser beam. If the approach can be refined and scaled, it points toward electronic components that could [...]

Metasurfaces Smooth Light to Boost Magnetic Sensing Precision

High-precision magnetic sensors rely on uniform light to polarize atomic spins, yet most laser beams naturally deliver energy unevenly, limiting measurement accuracy. This study introduces a compact optical strategy that transforms a standard Gaussian laser beam into a spatially uniform pumping field by encoding intensity information into light polarization. By reshaping how light interacts with atomic ensembles, the approach reduces spin decohe…