Scientists from the University of Science and Technology (Postech) have made a breakthrough in the creation of methagograms, holograms made using artificial substances called metamaterials. This development could have significant implications for a range of industries, including safety, displays, and biomedicine.
Until now, the creation of methagograms has been limited to the visible spectrum, but the Postech team has developed a method capable of operating in both the visible and ultraviolet spectral regions. This was achieved by including a thin layer of gas compounds within the metap.
Furthermore, the team was able to encode two different holographic phase profiles on a single metap by using polarization characteristics and a liquid crystal. This approach doubles the amount of information encoded on the metap.
Led by Professors Dzhongsuk Ro and Juhun Kim, the team is optimistic about the potential applications of their work. They believe the technology could be used in the development of holographic seals and banknotes, as well as for displays and biomedical purposes.
The team’s research has been published in the international magazine nanoscale horizons.