Ultrafast (femtosecond and attosecond) Processes in Nanosystems Mark I. Stockman Department of Physics and Astronomy, Georgia State University, Atlanta, GA We predict and quantitatively evaluate the unique possibility of concentrating the energy of an ultrafast excitation of a nanosystem in a small part of this nanosystem by means of coherent control (phase modulation of the exciting ultrashort pulse). Such concentration is due to dynamic properties of surface plasmons and leads to local fields enhanced by orders of magnitude. This effect exists for both engineered and random nanosystems. We discuss possible applications.