New technology will allow the production of cheap terahertz lenses

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

Scientists at Northwestern University of Mechanical Engineering (Illinois) have developed a technology for the production of simple and inexpensive lenses operating at these frequencies. Once again, 3D printing technology came to the aid of researchers in the form of a microstereolithography projection method.

The technology is a microscopic process in which a dynamic photomask is applied over a UV-sensitive polymer using a powerful ultraviolet beam generated by a laser. As a result, the material solidifies and fuses with the bottom layer to form a lens.

This 3D printing technology has enabled researchers to achieve the absolute precision required to form a metamaterial. According to the researchers, the new lenses will be able to focus terahertz images at a lower cost and with a higher resolution, which will facilitate their mass production.