Quantum dot exciton dynamics through a nanoaperture: Evidence for two confined states

L. M. Robinson, H. Rho, J. C. Kim, Howard E. Jackson, L. M. Smith, Sang Hoon Lee, M. Dobrowolska, J. K. Furdyna

Research output: Contribution to journalArticle

41 Citations (Scopus)

Abstract

Excitons confined to CdSe/ZnSe self-assembled quantum dots are probed through a nanoaperture using time-resolved photoluminescence. Significant evidence is shown that two different electronic states are associated with these dots, with binding energies which differ by an order of magnitude. The first has a short 450 ps lifetime, exhibits a relatively broad emission line, and persists nearly to room temperature; the second exhibits a long (> 4 ns) lifetime and is responsible for the sharp (˜100 μeV) lines seen at low temperatures (< 60 K). These results are completely unlike those seen in III-V dots, and reveal the complexity of the electronic structure in CdSe dots.

Original languageEnglish
Pages (from-to)2797-2800
Number of pages4
JournalPhysical Review Letters
Volume83
Issue number14
DOIs
Publication statusPublished - 1999 Jan 1
Externally publishedYes

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quantum dots
excitons
life (durability)
binding energy
electronic structure
photoluminescence
room temperature
electronics

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Robinson, L. M., Rho, H., Kim, J. C., Jackson, H. E., Smith, L. M., Lee, S. H., ... Furdyna, J. K. (1999). Quantum dot exciton dynamics through a nanoaperture: Evidence for two confined states. Physical Review Letters, 83(14), 2797-2800. https://doi.org/10.1103/PhysRevLett.83.2797

Quantum dot exciton dynamics through a nanoaperture : Evidence for two confined states. / Robinson, L. M.; Rho, H.; Kim, J. C.; Jackson, Howard E.; Smith, L. M.; Lee, Sang Hoon; Dobrowolska, M.; Furdyna, J. K.

In: Physical Review Letters, Vol. 83, No. 14, 01.01.1999, p. 2797-2800.

Research output: Contribution to journalArticle

Robinson, LM, Rho, H, Kim, JC, Jackson, HE, Smith, LM, Lee, SH, Dobrowolska, M & Furdyna, JK 1999, 'Quantum dot exciton dynamics through a nanoaperture: Evidence for two confined states', Physical Review Letters, vol. 83, no. 14, pp. 2797-2800. https://doi.org/10.1103/PhysRevLett.83.2797
Robinson, L. M. ; Rho, H. ; Kim, J. C. ; Jackson, Howard E. ; Smith, L. M. ; Lee, Sang Hoon ; Dobrowolska, M. ; Furdyna, J. K. / Quantum dot exciton dynamics through a nanoaperture : Evidence for two confined states. In: Physical Review Letters. 1999 ; Vol. 83, No. 14. pp. 2797-2800.
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