Quantum Cascade Terahertz Laser (IMAGE) University of Leeds Caption The quantum cascade terahertz laser built by University of Leeds researchers that has set a new world record output power. Credit (c) University of Leeds Usage Restrictions None 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.