Nanotech News and Headlines

Metasurfaces Smooth Light to Boost Magnetic Sensing Precision

Researchers at Beihang and Westlake Universities have demonstrated a silicon‑based metasurface that converts a Gaussian laser beam into a spatially uniform pumping field by encoding intensity into polarization. The planar device eliminates the need for bulky beam‑shaping optics and works independently of propagation distance. When integrated into a nuclear magnetic resonance co‑magnetometer, the homogenized beam boosted spin polarization, cut transverse relaxation rates, and lifted magnetic‑measurement sensitivity by roughly 23 percent. The approach promises compact, power‑efficient upgrades for a range of quantum‑sensor platforms.