NIST researchers have made metafilms of both tiny copper squares etched on a wafer (first image) and yttrium iron spheres (second image, each about 50 millimeters in diameter) embedded in a matrix.
NIST researchers have made metafilms of both tiny copper squares etched on a wafer (first image) and yttrium iron spheres (second image, each about 50 millimeters in diameter) embedded in a matrix.