Search results for "Droplet epitaxy"

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Growth of low-density vertical quantum dot molecules with control in energy emission

2010

This article is distributed under the terms of the Creative Commons Attribution Noncommercial License.-- This article is part of the series 8th International Workshop on Epitaxial Semiconductors on Patterned Substrates and Novel Index Surfaces.

NanostructureMaterials scienceNanochemistryNanotechnologyEpitaxyCondensed Matter::Materials ScienceMaterials Science(all)lcsh:TA401-492NanotechnologyMoleculeGeneral Materials ScienceChemistry/Food Science generalMaterial Sciencebusiness.industryQuantum dotsEngineering GeneralSpecial Issue ArticleMaterials Science generalCondensed Matter::Mesoscopic Systems and Quantum Hall EffectCondensed Matter PhysicsPhysics General8th International Workshop on Epitaxial Semiconductors on Patterned Substrates and Novel Index SurfacesQuantum dotMolecular MedicineOptoelectronicslcsh:Materials of engineering and construction. Mechanics of materialsPhotonicsbusinessDroplet epitaxyLayer (electronics)Molecular beam epitaxyMolecular beam epitaxy
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Single photon emission from impurity centers in AlGaAs epilayers on Ge and Si substrates

2012

We show that the epitaxial growth of thin layers of AlGaAs on Ge and Si substrates allows to obtain single photon sources by exploiting the sparse and unintentional contamination with acceptors of the AlGaAs. Very bright and sharp single photoluminescence lines are observed in confocal microscopy. These lines behave very much as single excitons in quantum dots, but their implementation is by far much easier, since it does not require 3D nucleation. The photon antibunching is demonstrated by time resolved Hanbury Brown and Twiss measurements.

Photon antibunchingPhotonMaterials sciencePhotoluminescencePhysics and Astronomy (miscellaneous)Droplet Epitaxybusiness.industryExcitonquantum dotCondensed Matter::Mesoscopic Systems and Quantum Hall EffectGallium arsenideCondensed Matter::Materials Sciencechemistry.chemical_compoundSemiconductorchemistrySingle photon emitterQuantum dotOptoelectronicsGaAbusinessFIS/03 - FISICA DELLA MATERIAMolecular beam epitaxyApplied Physics Letters
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