Coherent Nonlinear Optics, Backward Waves and Negative Spatial Dispersion Alexander K. Popov is a research professor of physics at the University of Wisconsin-Stevens Point. His research interests include nonlinear optics in negative-index metamaterials, resonant laser-matter interactions and laser-driven processes in metal nanocomposites. His work has led to more than 450 articles/book chapters and 4 books. He is a Fellow of the Optical Society of America. He received a Doctoral Degree in...