6533b7d2fe1ef96bd125e32a
RESEARCH PRODUCT
Size-filtering effects by stacking InAs/InP (001) self-assembled quantum wires into multilayers
Benito AlénJuan Pascual Martínez PastorLuisa González SotosJorge Manuel García MartínezJorge Manuel García MartínezSergio I. MolinaArturo PonceRicardo García Garcíasubject
Materials sciencePhotoluminescenceCondensed matter physicsSuperlatticeExcitonQuantum wiresStackingPhysics::OpticsEpitaxyCondensed Matter::Mesoscopic Systems and Quantum Hall EffectCondensed Matter::Materials ScienceMolecular-beam epitaxyTransmission electron microscopyMultilayer structureHomogeneity (physics)ExcitonPhotoluminescenceMolecular beam epitaxydescription
Multilayer structure containing vertically stacked InAs/InP self-assembled quantum wires have been successfully grown by molecular-beam epitaxy. The influence of the InP spacer layer thickness on the structural and optical properties of the wire superlattice has been studied by means of transmission electron microscopy and photoluminescence. The coherent propagation of the strain field in the sample with a 5-nm-thick spacer determines by a size filtering effect a good homogeneity and uniformity of the wire stacks, and hence a good optical quality. The exciton recombination dynamics in the wire superlattice cannot be related to thermal escape of carriers out to the barriers, as occurs in single layer samples.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2002-05-29 |