Harvard University Department of Physics

Many materials of potential technological importance are so complex that simulations of their electronic and mechanical properties are only now becoming possible. Elaborate computer calculations must be supplemented by insightful approximate theories that yield reliable results and provide more direct physical insight.

Henry Ehrenreich’s recent research has focused on the physics underlying infrared detectors, injection lasers, and thermoelectric cooling of novel semiconductor structures. Theories that predict device behavior under ideal conditions are used to optimize performance in laboratory prototypes. With calculations that range from interpretable yet sophisticated models to computationally intensive theoretical descriptions, Ehrenreich provides theoretical guidance to the experimental community. Professor Ehrenreich continues to investigate the fundamental physical understanding of electronic structure, cohesion, and the optical, magnetic and transport properties of metals, semiconductors, and alloys. As a result of interactions with both Washington- and Harvard-based groups and organizations, he has become actively involved in issues relating to energy, the environment, and other science and public policy related matters.