Exciton Footprint of Self-assembled AlGaAs Quantum Dots in Core-Shell Nanowires
Fontana, Y. ; Corfdir, P. ; Van Hattem, B. ; Russo-Averchi, E. ; Heiss, M. ; Sonderegger, S. ; Magen, C. (Universidad de Zaragoza) ; Arbiol, J. ; Phillips, R.T.
Resumen: Quantum-dot-in-nanowire systems constitute building blocks for advanced photonics and sensing applications. The electronic symmetry of the emitters impacts their function capabilities. Here we study the fine structure of gallium-rich quantum dots nested in the shell of GaAs-Al0.51 Ga0.49 As core-shell nanowires. We used optical spectroscopy to resolve the splitting resulting from the exchange terms and extract the main parameters of the emitters. Our results indicate that the quantum dots can host neutral as well as charged excitonic complexes and that the excitons exhibit a slightly elongated footprint, with the main axis tilted with respect to the long axis of the host nanowire. GaAs-AlxGa1-xAs emitters in a nanowire are particularly promising for overcoming the limitations set by strain in other systems, with the benefit of being integrated in a versatile photonic structure.
Idioma: Inglés
DOI: 10.1103/PhysRevB.90.075307
Año: 2014
Publicado en: Physical Review B. Condensed Matter and Materials Physics 90 (2014), 075307 [9 pp]
ISSN: 1098-0121
Factor impacto JCR: 3.736 (2014)
Categ. JCR: PHYSICS, CONDENSED MATTER rank: 14 / 67 = 0.209 (2014) - Q1 - T1
Financiación: info:eu-repo/grantAgreement/EC/FP7/312483/EU/Enabling Science and Technology through European Electron Microscopy/ESTEEM 2
Tipo y forma: Article (Published version)
Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)
You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes.
Exportado de SIDERAL (2019-05-29-11:38:22)
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Idioma: Inglés
DOI: 10.1103/PhysRevB.90.075307
Año: 2014
Publicado en: Physical Review B. Condensed Matter and Materials Physics 90 (2014), 075307 [9 pp]
ISSN: 1098-0121
Factor impacto JCR: 3.736 (2014)
Categ. JCR: PHYSICS, CONDENSED MATTER rank: 14 / 67 = 0.209 (2014) - Q1 - T1
Financiación: info:eu-repo/grantAgreement/EC/FP7/312483/EU/Enabling Science and Technology through European Electron Microscopy/ESTEEM 2
Tipo y forma: Article (Published version)
Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)
You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes. Exportado de SIDERAL (2019-05-29-11:38:22)
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Record created 2016-12-14, last modified 2019-05-29