Allen Taflove has pioneered the finite-difference time-domain method since 1972, and is a leading authority in the field of computational electrodynamics. He is a professor at Northwestern University, where he also received his B.S., M.S. and Ph.D. degrees. Steven G. Johnson is an associate professor of applied Mathematics at the Massachusetts Institute of Technology. He holds a Ph.D. in physics from from the Massachusetts Institute of Technology. Ardavan Oskooi is a postdoctoral associate at Kyoto University. He holds an M.S. in computation and engineering and Sc.D. in materials science and engineering from the Massachusetts Institute of Technology.