Metasurface directs terahertz waves (IMAGE) Princeton University, Engineering School Caption Princeton University researchers have developed a device that focuses and directs terahertz waves for use in high-speed communications. Credit Princeton University Usage Restrictions non-commercial use License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.