The demonstrated tuneable capacitance metamaterial, used as a terahertz amplitude modulator. Credit: Cavendish Laboratory Researchers at the Cavendish Laboratory, University of Cambridge have demonstrated a new way to control radiation in the terahertz range—an often-overlooked part of the electromagnetic spectrum—with unprecedented dynamic range and speed. The findings could open the door to advanced technologies in communications, imaging, and sensing and mark major progress in the development...