Scientists at the Northwestern University of Engineering (Illinois) have developed a technology for producing simple and inexpensive lenses operating at these frequencies. For the umpteenth time, the researchers came to the aid of 3D-printing technology in the form of the method of microstereolithography projection.
The technology is a microscopic process in which a dynamic photomask is applied over a UV-sensitive polymer with the help of a powerful ultraviolet ray generated by a laser . As a result, the material solidifies and fuses with the lower layer, forming a lens.
This technology of 3D printing has enabled researchers to achieve the absolute accuracy necessary for the formation of metamaterial. According to researchers, new lenses will be able to focus terahertz images at a lower price and with a higher resolution, which will contribute to their mass production.