Karl Unterrainer received the MS degree in Physics from the University of Innsbruck in 1986, and his Ph.D. degree in 1989 for his work on stimulated far infrared emission. Subsequently, he worked as a research assistant at the Institute for Experimental Physics and developed a far infrared tunable cyclotron resonance laser. In 1992 he became assistant professor at the Technical University Vienna. In 1994 and 1995 he worked as a visiting researcher at the Quantum Institute, University of California, Santa Barbara. He used nonlinear THz spectroscopy to study intersubband relaxation rates and observed the inverse Bloch oscillator effect. From 1997 till 2003 he was associate professor at the Technical University Vienna. Since 2004 he his full professor at the Photonics Institute, Technical University Vienna. He has been the director of the Center of Micro&Nanostructures ZMNS and of the Photonics Institute, and served as dean of the Faculty of Electrical Engineering and Information Technology, TU Wien. His main research areas are nano photonics, semiconductor nanostructures, time-resolved THz spectroscopy, and the development of THz devices. He is author or coauthor of more than 400 scientific articles; awards include a Schrödinger fellowship and the START Prize of the Austrian FWF.