Electronic Coupling Effects on the Optical Properties and Carrier Dynamics of InAs Quantum Dots
| Autor: | Stefano Taddei, S. Franchi, Anna Vinattieri, Stefano Sanguinetti, Massimo Gurioli, Paola Frigeri, Marcello Colocci, Emanuele Grilli, Mario Guzzi, S. Lozzia |
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| Přispěvatelé: | Gurioli, M, Sanguinetti, S, Lozzia, S, Grilli, E, Guzzi, M, Frigeri, P, Franchi, S, Colocci, M, Vinattieri, A, Taddei, S |
| Rok vydání: | 2002 |
| Předmět: |
Photoluminescence
Condensed matter physics Chemistry quantum dot Electron Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Condensed Matter Physics III-V semiconductor Electronic Optical and Magnetic Materials Coupling (electronics) Condensed Matter::Materials Science Delocalized electron Quantum dot Continuous wave photoluminescence Charge carrier FIS/03 - FISICA DELLA MATERIA Molecular beam epitaxy |
| Zdroj: | 190 (2002): 577. info:cnr-pdr/source/autori:Gurioli M., Sanguinetti S., Lozzia S., Grilli E., Guzzi M., Frigeri P., Franchi S., Colocci M., Vinattieri A.., Taddei S./titolo:Electronic coupling effects on the optical properties and carrier dynamics of inas quantum dots/doi:/rivista:/anno:2002/pagina_da:577/pagina_a:/intervallo_pagine:577/volume:190 |
| ISSN: | 1521-396X 0031-8965 |
| Popis: | Vertically aligned InAs/GaAs quantum dot structures were investigated. They were grown by atomic layer molecular beam epitaxy, with 10 layers and wedged spacer thickness d varying between 7.7 and 12.5 nm at steps of 0.2 nm. The effects of electronic coupling on the fundamental transition energy and decay dynamics were studied by time-resolved and continuous-wave photoluminescence (PL). The energy of the PL peak position decreases with increasing d, while the corresponding lifetime increases with d. This is attributed to the interplay of the electronic delocalization along the column and the Coulomb interaction between electrons and holes. Furthermore, a bell-shaped behaviour of the PL lifetime as a function of emission energy was observed inside the inhomogeneously broadened PL band. |
| Databáze: | OpenAIRE |
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