Stacking faults as quantum wells in nanowires: Density of states, oscillator strength, and radiative efficiency

Size-dependent oscillator strength and quantum efficiency of CdSe quantum dots controlled via the local density of states

M. D. Leistikow,1 J. Johansen,2 A. J. Kettelarij,1 P. Lodahl,2 and W. L. Vos1,3,* 1Center for Nanophotonics, FOM Institute for Atomic and Molecular Physics (AMOLF), Kruislaan 407 1098 SJ, Amsterdam, The Netherlands 2DTU Fotonik, Department of Photonics Engineering, Technical University of Denmark, Ørsteds Plads 343, DK-2800 Kgs. Lyngby, Denmark 3Complex Photonic Systems (COPS), Faculty of Scien...

The Effect of Structural Parameters on the Electronic States and Oscillator Strength of a Resonant Tunneling Quantum Well Infrared Photodetector

In this paper a resonant tunnelling quantum well infrared photodetector (RT-QWIP) is discussed. Each period of this photodetector structure comprises of a resonant tunnelling structure (AlAs/AlGaAs/AlAs) nearby a quantum well (AlGaAs/GaAs). In this photodetector, photocurrent is produced when an electron makes a transition from the ground state of the well to an excited state which is coupled t...

A new type of quantum wells: stacking faults in silicon carbide

We report on a new type of quantum wells with the width as thin as 10 Å, which are composed of SiC only, and consequently have ideal interfaces. These quantum wells are actually stacking faults in SiC. Certain types of stacking faults in SiC polytypes create small 3C-like regions, where the stacking sequences along the c-axis become locally cubic in the hexagonal host crystals. Since the conduc...

Photoluminescence study of basal plane stacking faults in ZnO nanowires

Excitonic Radiative Dynamics in Multiple Quantum Wells

The fundamental intrinsic radiative process associated with excitons in semiconductor multiple quantum wells is discussed within the context of exciton polaritons. Multiple quantum wells in which each well is randomly displaced from its ideal periodic position are discussed in order to investigate the effect of disorder on excitonic radiative widths. The coherent transpori of excitons in multip...