𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Splitting and storing excitons in strained coupled self-assembled quantum dots

✍ Scribed by T. Lundstrom; W.V. Schoenfeld; T. Mankad; A. Jaeger; H. Lee; P.M. Petroff

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
197 KB
Volume
7
Category
Article
ISSN
1386-9477

No coin nor oath required. For personal study only.

✦ Synopsis

We present a novel self-assembled quantum dot structure designed to spatially separate and store photo-generated electrons and holes in pairs of strain coupled quantum dots. The spatial separation of electron-hole pairs into quantum dots and strain-induced quantum dots has been investigated and veriΓΏed by photoluminescence experiments. Results from time-resolved PL demonstrates that at low temperatures (3 K) the electron-hole pair can be stored for several seconds.

πŸ“œ SIMILAR VOLUMES

Electronic states and tunneling times in
Electronic states and tunneling times in coupled self-assembled quantum dots
✍ R LΓ³pez-BolaΓ±os; G.H Cocoletzi; S.E Ulloa πŸ“‚ Article πŸ“… 2001 πŸ› Elsevier Science 🌐 English βš– 100 KB

Electron energy levels in single dots, and energy splitting and tunneling times in stacked quantum dots are calculated as functions of structure parameters. An effective mass approach is used to solve the SchrΓΆdinger equation for cylindrical dots with finite confinement potentials. Strong confinemen

Exchange coupling and polarization relax
Exchange coupling and polarization relaxation in self-assembled quantum dots
✍ R. Ferreira πŸ“‚ Article πŸ“… 2002 πŸ› Elsevier Science 🌐 English βš– 70 KB

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