Theodore Norris

Theodore Norris

Theodore Norris
Gerard A Mourou Collegiate Professor of Electrical Engineering and Computer Science and Professor of Electrical Engineering and Computer Science, College of Engineering
Engineering » Electrical Eng. and Comp. Sci.

The research in our group centers on the propagation and applications of ultrashort optical pulses. We have developed very-high-repetition-rate, broadly tunable femtosecond amplifiers, and used these novel laser sources in a wide variety of applications. We are interested in studying the dynamics of high-speed carrier transport in semiconductors, including ballistic transport and overshoot phenomena. Transport and relaxation processes in self-organized quantum dots (which are being used for novel semiconductor lasers and infrared detectors) are under active study using femtosecond spectroscopy; we have made the first observation of the phonon bottleneck in quantum dot relaxation, and recently have performed a comprehensive study of the gain dynamics in inverted quantum dots. We are also investigating the dynamics of quantum well excitons in semiconductor microcavities, including the use of coherent control of exciton populations as a way to generate new quantum optical states in semiconductors, and as a potential mechanism for high-speed optical switching. Femtosecond pulses are being used for the generation and detection of coherent terahertz radiation. Recently we have demonstrated a new technique for generating narrowband (or even arbitrarily shaped) THz waveforms using poled lithium niobate. Our research in semiconductor device physics is carried out in collaboration with the Solid State Electronics Lab here at Michigan, as well as with other groups fabricating state-of-the-art devices around the world.