This article reviews aspects of carrier dynamics concerning semiconduc
tor quantum wells in picosecond and femtosecond regime with emphasis o
n tunneling and spin relaxation which we were experimentally involved
in. We refer to recent significant developments in the field. We also
pick up intriguing aspects of quantum dots on possible applications to
both electronic and photonic devices related to the carrier dynamics.
(C) 1998 Elsevier Science S.A. All rights reserved.