His research interests are in wave physics, specializing in fast algorithms for multiple scattering imaging and computational electromagnetics in the last 30 years. His recent research interest is in combining quantum theory with electromagnetics, and differential geometry with computational electromagnetics.
He has co-authored three books, many lecture notes, over 400 journal papers, and over 600 conference papers. He is a fellow of various societies, and an ISI highly cited author. In 2000, he received the IEEE Graduate Teaching Award, in 2001, the AP-S Schelkunoff Best Paper Award, in 2008, he received the IEEE AP-S CT Tai Distinguished Educator Award, in 2013, elected to the National Academy of Engineering, and in 2015 received the ACES Computational Electromagnetics Award. He is selected to receive the 2017 IEEE Electromagnetics Award, and will be the next IEEE AP-S President in 2018. He has international collaboration with The U of Hong Kong, and participates actively in the inter-disciplinary Area of Excellence Project on Theory, Modeling, and Simulation of Emerging Electronics supported by the Hong Kong government.