gold nanoantennas tagged posts

This image shows a 3-D illustration of a metasurface skin cloak made from an ultrathin layer of nanoantennas (gold blocks) covering an arbitrarily shaped object. Light reflects off the cloak (red arrows) as if it were reflecting off a flat mirror. Credit: Image courtesy of Xiang Zhang group, Berkeley Lab/UC Berkeley

It conforms to the shape of an object and conceal it from detection with visible light. Although this cloak is only microscopic in size, the principles behind the technology should enable it to be scaled-up to conceal macroscopic items as well.

Working with brick-like blocks of gold nanoantennas, the Berkeley researchers fashioned a “skin cloak” barely 80nm in thickness, that was wrapped around a 3D object about the size of a few biological cells and arbitrarily shaped with mul...