JOHN WEINER graduated from Pennsylvania State University with high distinction and received his PhD from the University of Chicago. He is a Fellow of the American Physical Society and a member of numerous professional organizations, including the Optical Society of America, the American Chemical Society, the American Association for the Advancement of Science, the French Physical Society, and the French Optical Society. He has held many academic and research positions throughout the United States and France, and is currently a professor at Universite Paul Sabatier in Toulouse, France. P.-T. HO is a professor of electrical Engineering at the University of Maryland, College Park, where he has taught courses in electronics, electromagnetics, quantum electronics, and loudspeaker design. He received all his degrees from M.I.T., and has worked on optical semiconductor devices, ultrashort pulse techniques, and high power switches.