نتایج جستجو برای: quantum confinement
تعداد نتایج: 312482 فیلتر نتایج به سال:
While the dynamics for three-dimensional axially symmetric two-electron quantum dots with parabolic confinement potentials is in general non-separable we have found an exact separability with three quantum numbers for specific values of the magnetic field. Furthermore, it is shown that the magnetic properties such as the magnetic moment and the susceptibility are sensitive to the presence and s...
Nanoscale size effects drastically alter the fundamental properties of semiconductors. Here, we investigate the dominant role of quantum confinement in the field-effect device properties of free-standing InAs nanomembranes with varied thicknesses of 5-50 nm. First, optical absorption studies are performed by transferring InAs "quantum membranes" (QMs) onto transparent substrates, from which the...
While the dynamics for three-dimensional axially symmetric two-electron quantum dots with parabolic confinement potentials is in general non-separable we have found an exact separability with three quantum numbers for specific values of the magnetic field. Furthermore, it is shown that the magnetic properties such as the magnetic moment and the susceptibility are sensitive to the presence and s...
Using the atomistic pseudopotential method complemented by configuration interaction calculations, we have studied the electronic and optical properties of ZnO nanowires (NWs) in the presence of quantum confinement effects. Our results indicate that the near-band-edge exciton experiences a crossover from an in-plane polarized A-exciton (for D≥ 3 nm) to an out-of-plane polarized C-exciton (for D...
We have examined the carrier capture dynamics and excitation dependent charge distributions of coupled InGaN/GaN multiple quantum well samples. We measured the temporal evolution of time-delayed cathodoluminescence CL spectra to study the temperatureand excitation-dependent transfer of carriers from a surrounding confinement region into a coupled single quantum well. Samples possessing two diff...
We report systematic measurements of the dephasing of the excitonic ground-state transition in a series of InGaAs/GaAs quantum dots having different quantum confinement potentials. Using a highly sensitive fourwave mixing technique, we measure the polarization decay in the temperature range from 5 to 120 K on nine samples having the energy distance from the dot ground-state transition to the we...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید