Dr. Tolk received the A.B. degree from Harvard College, Cambridge, MA, in 1960 and the Ph.D. degree from Columbia University, New York, in 1966. He is a Professor of Physics in the Department of Physics and Astronomy, Vanderbilt University, Nashville, TN. He is also an Adjunct Professor of Physics at Fisk University, Nashville, TN. He was a Member of Technical Staff at Bell Laboratories, Murray Hill, NJ (1968-1984). He holds seven patents, is the author or coauthor of three edited books and more than 240 papers on nonlinear laser-surface and laser-interface interactions, ultra-fast vibrational and electronic processes at surfaces and interfaces, spin dynamics, desorption induced by electronic process, and atomic collision physics. Dr. Tolk is a Fellow of the American Physical Society. He received the Alexander von Humboldt Senior Scientist Award in 1987.