New technology will make cheap terahertz lenses

Science 10 Mar 2018
New technology will make cheap terahertz lenses


The frequencies of terahertz radiation are between the microwave and infrared wavelengths. At the moment it is an actively developing technology, due to a number of unique properties. Unlike X-rays, terahertz radiation does not harm the body, and also allows rapid analysis of materials.

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.

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