Nanocrystals (NCs) discussed in this Review are tiny crystals of metals, semiconductors,
and magnetic material consisting of hundreds to a few thousand atoms each. Their size …

The basic concepts of sum frequency generation are reviewed and its application to the
measurement of time-resolved luminescence spectra with subpicosecond time resolution is …

The field of ultrafast spectroscopy of semiconductors and their nanostruc tures continues to
be an active field of research. Exciting new developments have taken place since the first …

The science describing semiconductor− liquid interfaces is highly interdisciplinary, broad in
scope, interesting, and of importance to various emerging technologies. We present a …

The Al x Ga 1− x As/GaAs heterostructure system is potentially of great importance for many
high-speed electronics and optoelectronic devices, because the lattice parameter difference …

Carrier transport can significantly affect the high-speed properties of quantum-well lasers.
The authors have developed a model and derived analytical expressions for the modulation …

Bloch equation conductivity perpendicular to the layers of a superlattice (period d) is
evaluated using an extension of the balance-equation approach [XL Lei and CS Ting, Phys …

The optical response of nonparabolic quantum wells is dominated by a strong peak at the
plasmon frequency. When the electrons reach the anharmonic regions, resonant absorption …

By time-of-flight studies, the lateral transport of two-dimensional excitons in GaAs/Ga 1− x Al
x As quantum wells is studied with a very high spatial resolution (∼ 0.1 μm) provided by …

Infrared spectroscopy is a powerful tool for revealing some key properties of electrons in the
minibands of semiconductor superlattices. Some theoretical foundations of superlattice …