The conditions are found for the existence of polar surface vibrational modes on a spheroidal quantum dot. These conditions determine allowed windows in the frequency-surface coordinate plane. The modes found are either truly localized of leaky states. The latter can provide e ective energy relaxati
Properties of self-assembled Ga-polar and N-polar GaN/AlN quantum dots
β Scribed by N. Gogneau; E. Monroy; F. Fossard; B. Gayral; S. Monnoye; H. Mank; B. Daudin
- Publisher
- John Wiley and Sons
- Year
- 2004
- Tongue
- English
- Weight
- 185 KB
- Volume
- 1
- Category
- Article
- ISSN
- 1862-6351
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π SIMILAR VOLUMES
We consider the spin-coupling for one electron-hole pair bound in single self-assembled quantum dots. The long-range exchange coupling leads to a vanishing spin splitting of the ground interband transition in cylindrical dots. We evaluate the spin-splitting for di erent electron-hole levels of non-c
In a stacked structure of cubic GaN/AlN islands grown in a Stranski-Krastanov mode, the critical thickness for the GaN islanding (2D-3D transition) decreases by a factor of up to 10 between the initial dot layer and the third one. This variation of the critical thickness is strongly dependent on the