Nanowerk  May 1, 2018
A team of researchers in the US (Duke University, UC San Diego) has developed a technology where each grid location of a metamaterial contains a photodoped silicon cylinder making it conductive. The size of the cylinders dictates what frequencies of light they can interact with, while the angle of the photodoping affects how they manipulate the electromagnetic waves. For demonstration they sized the cylinder to interact with terahertz waves. According to the researchers controlling terahertz waves could improve broadband communications between satellites, and lead to security technology. The approach could also be adapted to other bands of the electromagnetic spectrum by scaling the size of the cylinders… read more. TECHNICAL ARTICLE
Artistic representation of the new metasurface technology. Rays of light (red) bombard the silicon cylinders, changing their electromagnetic properties to precisely tune how they interact with electromagnetic waves. (Image: Kebin Fan, Duke University)