3 d transition impurities in wide-gap oxides may function as donor/acceptor defects to modify
carrier concentrations, and as magnetic elements to induce collective magnetism. Previous …

We construct an accurate cluster expansion for the (Ga 1-x Zn x)(N 1-x O x) solid solution,
based on density functional theory (DFT). The subsequent Monte Carlo simulation reveals a …

Einstein's assumption that the speed of light is constant is a fundamental principle of modern
physics with great influence. However, the nature of the principle of constant speed of light is …

The propagation of coherent and partially coherent light pulses through a one-dimensional
photonic crystal (1 DPC) is investigated. The dependence of the evolution of the pulses …

Propagation of an electromagnetic pulse through a dielectric slab doped with three-level
ladder-type atomic systems is discussed. It is shown that the group velocity of the reflected …

The reflection and transmission of a pulse through a slab which is doped with two-level or
three-level atoms are investigated theoretically. The doped atoms can be passive …

We consider an active-Raman-gain scheme for realizing giant Kerr nonlinearity and
superluminal optical solitons in a four-state atomic system with a gain doublet. We show that …

We investigate the dispersion and the absorption properties of a weak probe field in a four-
level atomic system by using the incoherent pumping fields. It is shown that the slope of the …

Zinc phosphide (Zn 3 P 2) could be the basis for cheap and highly efficient solar cells. Its use
in this regard is limited by the difficulty in n-type doping of the material. In an effort to …

We demonstrate the formation of superluminal optical soliton in an symmetry semiconductor
double quantum dot (QD) driven coherently by a weak pulsed laser using the tunnel …