The sixth-generation (6G) mobile communication technology aims to revolutionize wireless connectivity by achieving data rates exceeding 100 Gbps, far surpassing the current capabilities of 4G and 5G. To reach such an ambitious target, scientists and engineers are turning to the sub-terahertz D-band (110–170 GHz), which offers the wider bandwidth necessary for ultra-high-speed, high-capacity communications.| Science Tokyo