Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí hóa hoc quốc tế đề tài : Effect of triplet multiple quantum well structures on the performance of blue phosphorescent organic light emitting diodes
This chapter presents the basic theory and characteristics of stimulated
emission and optical amplification gain in semiconductors. The former is the
mostimportant principlethat enablessemiconductorlaserstobeimplemented,
and the latter is the most important parameter for analysis of the laser
performances. First, stimulated emission in semiconductors is explained, and
then quantum theory analysis and statistic analysis using the density matrix
of the optical amplification gain are given.
Semiconductor nanostructures are currently one of the largest and most exciting
areas in solid state physics. Low-dimensional electron systems (realized in
semiconductor quantum structures) are particularly appealing because they
allow one to study many-particle effects in reduced dimensions. Inelastic light
scattering gives direct access to the elementary excitations of those systems.
Semiconductor lasers are among the most important optoelectronics
devices. Remarkable development has been accomplished in the three
decades since the first achievement in room-temperature continuous
oscillation, which opened the possibility of practical applications of
semiconductor lasers. Today, various types of semiconductor lasers are
mass-produced and widely used as coherent light sources for a variety of
applications, including optical fiber communication systems and optical
disk memory systems....
Research and development in modern optical and photonic technologies have
witnessed quite fast growing advancements in various fundamental and application areas
due to availability of novel fabrication and measurement techniques, advanced numerical
simulation tools and methods, as well as due to the increasing practical demands. The recent
advancements have also been accompanied by the appearance of various interdisciplinary
Recent developments/efforts to understand aspects of the brain function at the subneural
level are discussed. MicroTubules (MTs), protein polymers constructing the
cytoskeleton, participate in a wide variety of dynamical processes in the cell. Of special
interest to us is the MTs participation in bioinformation processes such as learning
and memory, by possessing a well-known binary error-correcting code [K1(13, 26, 5)]
with 64 words. In fact, MTs and DNA/RNA are unique cell structures that possess
a code system.
Arapkina and Yuryev Nanoscale Research Letters 2011, 6:345 http://www.nanoscalereslett.com/content/6/1/345
CMOS-compatible dense arrays of Ge quantum dots on the Si(001) surface: hut cluster nucleation, atomic structure and array life cycle during UHV MBE growth
Larisa V Arapkina and Vladimir A Yuryev*
Abstract We report a direct observation of Ge hut nucleation on Si(001) during UHV molecular beam epitaxy at 360°C. Nuclei of pyramids and wedges were observed on the wetting layer (WL) (M × N) patches starting from the coverage of 5.
The new millennium has seen the birth of a new perspective that conflates research in solid-state physics, biological science as well
as materials engineering. The perspective is one that recognizes that
future new advances in all these areas will be based on a fundamental
understanding of the atomic and molecular infrastructure of
materials that has resulted from two centuries of chemistry. Major
advances will be achieved when the novel behavior, in particular the
quantum mechanical behavior, that nanoscale structures possess, can
be controlled and harnessed....