Professor Emmanouil (Manos) Kioupakis, from the University of Michigan, visited Sandia for technical discussions and to give a seminar on “Auger Recombination in Nitride Light-Emitting Diodes from First Principles Calculations.” Professor Kioupakis just finished a post-doc with Professor Chris van de Walle at UC Santa Barbara, and has been doing first-principles calculations of Auger recombination as a possible (and perhaps likely) mechanism for efficiency droop in InGaN LEDs. More recently, Professor Kioupakis has been working on the scaling with polarization fields not only of Auger recombination, but of other recombination processes (Shockley-Read-Hall and radiative). This last topic is of intense interest for predicting efficiency droop in novel architectures such as non-c-plane LEDs, and c-plane and non-c-plane laser diodes. At UCSB, Manos was supported in part by the Center for Energy Efficiency Materials (CEEM); now, at the University of Michigan, Manos is supported in part by the Center for Solar and Thermal Energy Conversion (CSTEC).