Dr Dayan Ban is a Professor in the Department of Electrical and Computer Engineering at the University of Waterloo. He spent his sabbatical leave at the Laboratory of Research Electronics (RLE) at MIT, Cambridge, MA, USA, in 2009 as a visiting scientist. He was a research staff member at the Institute for Microstructural Sciences of the National Research Council, Ottawa, Canada, before joining the University of Critical Review Analyst Waterloo in 2005. He was a visiting scientist at Nortel from 2001 to 2002, where he and his colleagues developed and applied novel scanning probe microscopy techniques. His current research interests include optoelectronics, semiconductor quantum devices, tera-hertz quantum cascade lasers, infrared optical upconversion devices, infrared imaging devices, scanning probe microscopy, nanotechnology, and nanofabrication.