CuInSe2 quantum dots grown by molecular beam epitaxy on amorphous SiO2 surfaces

Blue–green–red LEDs based on InGaN quantum dots grown by plasma-assisted molecular beam epitaxy

Self-assembled InGaN quantum dots were grown in the Stranski–Krastanov mode by plasma-assisted molecular beam epitaxy. The average dot height, diameter and density are 3 nm, 30 nm and 7 × 1010 cm–2, respectively. The dot density was found to decrease as the growth temperature increases. The cathodoluminescence emission peak of the InGaN/GaN multiple layer quantum dots (MQDs) was found to red sh...

Direct formation of InAs quantum dots grown on InP „001... by solid-source molecular beam epitaxy

We have developed a growth process that leads to the direct formation of self-assembled InAs quantum dots on InP 001 by solid-source molecular beam epitaxy avoiding the previous formation of quantum wires usually obtained by this technique. The process consists of a periodically alternated deposition of In and As correlated with InAs 4 2 ↔ 2 4 surface reconstruction changes. Based on the result...

CdSe quantum dots grown on ZnSe and Zn0.97Be0.03Se by molecular-beam epitaxy: Optical studies

We report detailed studies of the photoluminescence ~PL! properties of CdSe quantum dots ~QDs! grown on ZnSe and Zn0.97Be0.03Se by molecular-beam epitaxy. We performed steady-state and time-resolved PL measurements and observed that nonradiative processes dominate at room temperature ~RT! in the CdSe/Zn0.97Be0.03Se QD structures while these nonradiative processes do not dominate in the CdSe/ZnS...

Defect reduction with quantum dots in GaN grown on sapphire substrates by molecular beam epitaxy

The effects of rapid thermal annealing on doubled quantum dots grown by molecular beam epitaxy

The effects of different rapid thermal annealing temperatures on the optical properties of InAs double quantum dots (DQDs) grown by molecular beam epitaxy using a partial-capping-and-regrowth process have been investigated. Improvement of the material quality is indicated by enhanced photoluminescence (PL) intensity and narrower PL linewidth. The blueshift of the PL emission peak with increasin...