His research focuses on the structure-property relation of atomically engineered complex (nano)materials, especially thin film ceramic oxides. Current research includes the growth and study of artificial materials, the physics of reduced scale (nanoscale) materials, metal-insulator transitions and in situ photoelectron spectroscopy. This research includes (multi)ferroic, piezoelectric, magnetic and correlated electron complex oxide materials. Koster graduated in Applied Physics (MsC and PhD) and has worked at Stanford University and the University of British Colombia and currently teaches materials science courses for AT, TN, ST, ChE, TG.