Joachim Piprek received his Diploma and Doctoral degrees in physics from Humboldt University in Berlin, Germany. For more than two decades, he worked in industry and academia on design, simulation, and analysis of semiconductor devices used in optoelectronics. Dr. Piprek has taught graduate courses at universities in Germany, Sweden, and in the United States. He is founder and co-chair of the annual conference on Numerical Simulation of Optoelectronic Devices (IEEE) and he also chaired several SPIE conferences. Dr. Piprek was invited guest editor for various special journal issues on optoelectronic device simulation and he currently serves as executive/associate editor of two research journals. He has published 4 books, 7 book chapters, and about 250 papers with close to 8000 citations. For more than 15 years, his institute has been providing technical and educational services to corporations and research labs worldwide.