Dr. Garth J. Simpson is a Professor of Analytical and Physical Chemistry at Purdue University. Dr. Simpson received his B.S. from Western Washington University and his Ph.D. from the University of Colorado, Boulder. His research focuses on the theoretical development and experimental application of new instrumental methods taking advantage of unique nonlinear optical interactions. Recent interests include detection and analysis of crystals formed from chiral molecules, building on a long-standing interest in understanding the role of chirality and polarization-dependent effects in nonlinear optics.