Underused part of the electromagnetic spectrum gets optics boost from metamaterial

Terahertz radiation, or T-rays, has barely been exploited compared to most of the rest of the electromagnetic spectrum. Yet T-rays potentially have applications in next-generation wireless communications (6G/7G), security systems, biomedicine, and even art history. A new device for controlling T-rays using a specially designed ‘metasurface’ with properties not found in nature could begin to realize this potential.