DOI | Trouver le DOI : https://doi.org/10.1557/opl.2011.300 |
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Auteur | Rechercher : Modi, Nikhil; Rechercher : Tsybeskov, Leonid; Rechercher : Lockwood, David J.1; Rechercher : Wu, Xiao Z.2; Rechercher : Baribeau, Jean Marc2 |
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Affiliation | - Conseil national de recherches du Canada. Science des mesures et étalons
- Conseil national de recherches du Canada. Technologies de l'information et des communications
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Format | Texte, Article |
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Conférence | 2010 MRS Fall Meeting, 29 November 2010 through 3 December 2010, Boston, MA |
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Sujet | Analytical electron microscopy; Excitation wavelength; Interface recombination; Low temperature photoluminescence; PL lifetime; PL quantum efficiency; PL spectra; Si/SiGe; Strain engineering; Strained Silicon; Three-dimensional nanostructures; Time-resolved PL measurement; Ultrahigh resolution; Electron microscopy; Germanium; Semiconductor quantum wells; Nanostructures |
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Résumé | Strain engineering in composition-controlled Si-Si/Ge nanocluster multilayers with high germanium content (∼ 50%) is achieved by varying thicknesses of Si/SiGe layers and studied by low temperature photoluminescence (PL) measurements. The PL spectra show reduction in strained silicon energy bandgap and a splitting presumably associated with partial removal of heavy hole-light hole degeneracy in SiGe valence band. Time-resolved PL measurements performed under different excitation wavelengths show dramatically different PL lifetimes, ranging from ∼ 2 μs to 10 ns and an unusually high PL quantum efficiency. The results are explained by using the Si/SiGe interface recombination model, which is supported by ultra-high resolution transmission and analytical electron microscopy measurements. © 2011 Materials Research Society. |
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Date de publication | 2011 |
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Dans | |
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Série | |
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Langue | anglais |
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Publications évaluées par des pairs | Oui |
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Numéro NPARC | 21271549 |
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Exporter la notice | Exporter en format RIS |
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Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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Identificateur de l’enregistrement | 446f7bb7-f43f-435c-afd7-da28d680e547 |
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Enregistrement créé | 2014-03-24 |
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Enregistrement modifié | 2020-04-21 |
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