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Resonant optical excitation and intermixing in InAs/AlAs single quantum dots

Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review

Autorschaft

  • D. Sarkar
  • J. M. Calleja
  • H. P. van der Meulen
  • J. M. Meyer
  • R. J. Haug

Organisationseinheiten

Externe Organisationen

  • Universidad Autónoma de Madrid (UAM)
  • Physikalisch-Technische Bundesanstalt (PTB)
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Details

OriginalspracheEnglisch
Seiten (von - bis)2172-2175
Seitenumfang4
FachzeitschriftPhysica E: Low-Dimensional Systems and Nanostructures
Jahrgang40
Ausgabenummer6
PublikationsstatusVeröffentlicht - 1 Apr. 2008

Abstract

The optical excitation spectra of single self-organized InAs/AlAs quantum dots reveal transitions to excited states involving quantum dot phonons. Resonant excitation is observed at 31 and 41 meV, corresponding to the "InAs-like" and "AlAs-like" optical phonons of InAlAs with low Al concentration. Polarization-resolved measurements reveal separate resonances at the fine structure split exciton levels. The present results demonstrate that both LO phonons in a mixed quantum dot can contribute to the relaxation of excited states and represent a direct measurement of the intermixing in a single quantum dot.

ASJC Scopus Sachgebiete

Zitieren

Resonant optical excitation and intermixing in InAs/AlAs single quantum dots. / Sarkar, D.; Calleja, J. M.; van der Meulen, H. P. et al.
in: Physica E: Low-Dimensional Systems and Nanostructures, Jahrgang 40, Nr. 6, 01.04.2008, S. 2172-2175.

Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review

Sarkar D, Calleja JM, van der Meulen HP, Meyer JM, Haug RJ, Pierz K. Resonant optical excitation and intermixing in InAs/AlAs single quantum dots. Physica E: Low-Dimensional Systems and Nanostructures. 2008 Apr 1;40(6):2172-2175. doi: 10.1016/j.physe.2007.10.076
Sarkar, D. ; Calleja, J. M. ; van der Meulen, H. P. et al. / Resonant optical excitation and intermixing in InAs/AlAs single quantum dots. in: Physica E: Low-Dimensional Systems and Nanostructures. 2008 ; Jahrgang 40, Nr. 6. S. 2172-2175.
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title = "Resonant optical excitation and intermixing in InAs/AlAs single quantum dots",
abstract = "The optical excitation spectra of single self-organized InAs/AlAs quantum dots reveal transitions to excited states involving quantum dot phonons. Resonant excitation is observed at 31 and 41 meV, corresponding to the {"}InAs-like{"} and {"}AlAs-like{"} optical phonons of InAlAs with low Al concentration. Polarization-resolved measurements reveal separate resonances at the fine structure split exciton levels. The present results demonstrate that both LO phonons in a mixed quantum dot can contribute to the relaxation of excited states and represent a direct measurement of the intermixing in a single quantum dot.",
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note = "Funding information: This work has been supported by research contracts of the Spanish Ministry of Education (MEC MAT2005-01388, NAN2004-09109-C04-04 and Consolider-CSD 2006-19) and the Community of Madrid (CAM S-0505-/ESP-0200).",
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T1 - Resonant optical excitation and intermixing in InAs/AlAs single quantum dots

AU - Sarkar, D.

AU - Calleja, J. M.

AU - van der Meulen, H. P.

AU - Meyer, J. M.

AU - Haug, R. J.

AU - Pierz, K.

N1 - Funding information: This work has been supported by research contracts of the Spanish Ministry of Education (MEC MAT2005-01388, NAN2004-09109-C04-04 and Consolider-CSD 2006-19) and the Community of Madrid (CAM S-0505-/ESP-0200).

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AB - The optical excitation spectra of single self-organized InAs/AlAs quantum dots reveal transitions to excited states involving quantum dot phonons. Resonant excitation is observed at 31 and 41 meV, corresponding to the "InAs-like" and "AlAs-like" optical phonons of InAlAs with low Al concentration. Polarization-resolved measurements reveal separate resonances at the fine structure split exciton levels. The present results demonstrate that both LO phonons in a mixed quantum dot can contribute to the relaxation of excited states and represent a direct measurement of the intermixing in a single quantum dot.

KW - Phonons

KW - Photoluminescence

KW - Quantum dots

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ER -

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